Every new client call starts the same way, someone reading out a term their last agency used in a report, asking what it actually means. I don’t blame them. This industry loves jargon more than it loves clarity, and half of it is either a proprietary metric dressed up as a Google term, or a real Google concept explained badly.
This glossary is the list I wish I could just hand people instead of re-explaining it on every call. No definition here is copied from anyone else’s glossary these are written the way I’d actually explain each term to a client, including where the term gets misused.
A
AI Overviews
Google’s AI generated summary that can appear above the normal search results, pulling from multiple sources to answer a query directly. Google has stated AI Overviews use the same core ranking systems as regular Search, so showing up in one still starts with being crawlable, indexable, and genuinely well-structured, not a separate game with separate rules.
Algorithm Update
A change Google makes to how it ranks pages. Most updates are small and unnamed; the ones that get names (like a Core Update) are broad enough to noticeably shift rankings across many sites. If your traffic drops, check Google Search Central’s own update list before assuming you did something wrong, sometimes it’s genuinely not about your site at all.
Alt Text
The written description attached to an image, meant for people using screen readers and for search engines that can’t “see” an image the way you can. Good alt text describes what’s actually in the image in plain language, “woman reviewing SEO dashboard on laptop,” not “seo dashboard best seo company image1.”
Anchor Text
The clickable words in a hyperlink. “Read our pricing guide” is anchor text; so is a bare URL, though it’s far less useful to both users and search engines. Anchor text gives Google a hint about what the linked page is about, which is exactly why stuffing exact-match keywords into every anchor looks manipulative rather than natural.
Answer Engine Optimization (AEO)
The practice of structuring content so AI tools like ChatGPT, Perplexity, or Google’s AI Overviews can lift a clear, accurate answer straight from your page and cite you as the source. It’s not a separate discipline from SEO so much as an extension of it the same clear writing, real expertise, and clean structure that helps a human skim your page also helps an AI system extract from it.
B
Backlink
A link from another website pointing to yours. Still one of the strongest signals Google uses to gauge trust and authority, but the industry learned the hard way (through years of Google penalties) that quantity without relevance and quality is worse than useless it can actively hurt you.
Bounce Rate
The percentage of visitors who land on a page and leave without any further interaction. A high bounce rate isn’t automatically bad someone who lands on a page, finds their answer in ten seconds, and leaves satisfied still “bounced.” Context (what the page and the visitor’s intent actually were) matters more than the raw number.
Broken Link
A link, internal or external, that points to a page that no longer exists, usually returning a 404. Broken links waste crawl budget, hurt user experience, and on a large site can quietly bleed link equity if important pages are only reachable through dead links.
C
Canonical Tag
An HTML tag (rel=”canonical”) that tells search engines which version of a page is the “master” copy when duplicate or near-duplicate versions exist, think a product page reachable through three different URL parameters. Get this wrong and you can accidentally tell Google to ignore the page you actually want ranked.
Content Gap
A topic or keyword your competitors rank for that you don’t currently cover, usually found by comparing your content against theirs. Finding a content gap is easy; the actual skill is deciding which gaps are worth filling versus which ones exist because that topic genuinely doesn’t fit what your business does.
Core Web Vitals
Google’s set of metrics for measuring real-world page experience: Largest Contentful Paint (loading speed), Interaction to Next Paint (responsiveness), and Cumulative Layout Shift (visual stability). I’ve had clients whose developer insisted the site was “fast” based on a desktop test on office Wi-Fi, Core Web Vitals uses real user data, which is a very different, much less forgiving picture.
Crawl Budget
The number of pages a search engine will crawl on your site within a given timeframe. It matters mainly for large sites, a 40-page brochure site will never hit a crawl budget ceiling, but a 50,000-page e-commerce catalog with thin filter pages absolutely can, which is part of why we recently blocked a wave of junk-parameter URLs from being crawled at all on a client site rather than letting them eat budget that real pages needed.
Crawling
The process by which search engine bots discover pages by following links from page to page. A page can’t be indexed if it’s never crawled, which is why crawlability, clean internal linking, no accidental robots.txt blocks, no orphaned pages is step zero of technical SEO.
CTR (Click-Through Rate)
The percentage of people who see your listing in search results and actually click it. A page can rank #3 and still underperform a page ranking #5 if its title and meta description don’t give people a reason to click, CTR is one of the few SEO metrics you can improve without touching rankings at all.
Cumulative Layout Shift (CLS)
One of the three Core Web Vitals it measures how much content unexpectedly shifts around while a page loads. The classic offender is an ad or image loading late and pushing the button you were about to tap down the page, so you misclick something else instead.
D
De-indexing
When a page is removed from a search engine’s index, either deliberately (via a noindex tag) or as a penalty for violating guidelines. A sudden, unexplained de-indexing of pages you didn’t touch is one of the clearer signs of a hacked site or a manual action, worth checking Search Console immediately, not assuming it’s a fluke.
Dofollow / Nofollow Link
By default, a link passes “link equity” (dofollow). Adding rel=”nofollow” tells search engines not to pass that credit commonly used for paid links, user-generated content like blog comments, or links you don’t want to vouch for. Google also has sponsored and ugc attributes now for more specific cases.
Domain Authority (DA)
A third-party metric from Moz (not a Google metric) that scores a domain’s likely ranking strength from 1-100, based on backlink profile. It’s genuinely useful as a rough, relative benchmark against competitors but I’ve seen too many people treat it like a real Google score, and Google has said plainly it doesn’t use DA for anything.
Domain Rating (DR)
Ahrefs’ equivalent to Moz’s Domain Authority same idea, different company, different scoring model, and just as much not a Google metric. DA and DR scores for the same site are rarely identical, which trips people up until they realize they’re comparing two different companies’ independent formulas, not two views of the same underlying number.
Duplicate Content
Substantially similar content appearing on multiple URLs, whether across your own site or copied elsewhere. It’s a common myth that Google “penalizes” duplicate content by default more often it just picks one version to rank and ignores the rest, which is still a problem if it picks the wrong one.
E
E-E-A-T
Experience, Expertise, Authoritativeness, and Trustworthiness the framework in Google’s Search Quality Rater Guidelines for how human raters assess content quality. Important nuance people get wrong constantly: Google has stated E-E-A-T itself is not a direct ranking factor. It informs the signals Google’s actual ranking systems use, which is a real distinction, not a technicality.
Entity (in SEO)
A specific, identifiable thing a person, a place, a brand, a concept that Google’s Knowledge Graph can recognize distinctly from just a string of text. Building “entity” strength means being consistently, clearly identified as the same thing across your site, your Google Business Profile, and other authoritative sources, so Google connects the dots rather than treating you as an ambiguous name.
F
Featured Snippet
The highlighted answer box that sometimes appears at the top of Google’s results, pulled directly from a ranking page. Structuring content with a clear, direct answer near the top of a section a real sentence answering the real question, not a teaser is still the most reliable way to earn one.
First Contentful Paint (FCP)
The moment the first piece of content actually renders on screen during page load not the whole page, just the first visible sign that something is happening. It’s not one of the three official Core Web Vitals, but it’s a useful early-loading signal, especially for diagnosing why a page “feels” slow even before the main content finishes loading.
404 Error
The status code a server returns when a requested page doesn’t exist. A handful of 404s is completely normal on any site the problem is 404s from pages that used to exist and still have backlinks or internal links pointing at them, which is when a redirect is the right fix instead of just leaving it broken.
G
GEO (Generative Engine Optimization)
The practice of optimizing content to be found, understood, and cited by AI systems like ChatGPT, Perplexity, and Google’s AI Overviews a term the industry coined as AI search grew, distinct from but overlapping heavily with traditional SEO. In practice it means the same fundamentals (crawlable content, clear structure, real expertise) plus attention to things like whether your content survives without JavaScript, since many AI crawlers don’t render it.
Google Business Profile
The free listing that controls how your business appears in Google Maps and the local “map pack” results name, address, phone, hours, reviews, photos. For any business with a physical location or service area, an optimized, actively managed profile often drives more visible local traffic than the website itself.
Google Search Console
Google’s free tool for site owners to see how Google actually crawls, indexes, and ranks their site impressions, clicks, indexing errors, manual actions, and more. If you’re not checking it at least monthly, you’re flying blind on exactly the data source that shows you problems (like a wave of junk URLs being crawled) before they become bigger ones.
Googlebot
Google’s web crawler the actual software that visits your pages, follows your links, and reports back what it finds so Google can index and rank you. When people say “does Google see this,” they usually mean “would Googlebot be able to crawl and render this,” which isn’t always the same as what a human visitor sees.
H
H1 / Heading Tags
The HTML tags (H1 through H6) that structure a page’s content hierarchy H1 for the main title, H2s for major sections, H3s for subsections within those. Skipping levels (H2 straight to H4) doesn’t just look sloppy in the code, it makes the page harder for both screen readers and search engines to understand the actual structure of your content.
Hreflang
An HTML attribute that tells search engines which language and regional version of a page to show to which users essential for any site serving multiple countries or languages. Get hreflang wrong and you can end up with the wrong-language version ranking in the wrong country, which is a surprisingly common and surprisingly invisible mistake.
HTTPS
The secure, encrypted version of HTTP the padlock in your browser’s address bar. It’s been a confirmed, if lightweight, Google ranking signal for years, but more importantly it’s table stakes for user trust now; a site without it actively warns visitors it’s “not secure.”
I
Impressions
In Search Console, the number of times your page appeared in search results for any query whether or not anyone clicked it. High impressions with a low click-through rate is a specific, fixable signal: people are seeing you but your title/description isn’t earning the click.
Index / Indexing
Once a page is crawled, indexing is Google adding it to its massive database of pages eligible to show in search results. Crawled doesn’t automatically mean indexed Google can crawl a page and still choose not to index it if it judges the content too thin, duplicate, or low-value.
INP (Interaction to Next Paint)
One of the three Core Web Vitals, replacing the older First Input Delay metric in 2024. It measures how responsive a page feels across the whole visit how long between a user’s click, tap, or keypress and the page actually visibly responding not just the very first interaction.
Internal Link
A link from one page on your site to another page on the same site. Internal links are the single most underused SEO lever I see in client audits they’re free, entirely within your control, and directly help both users and search engines find your important pages faster.
K
Keyword
The word or phrase someone types (or speaks) into a search engine. Modern SEO cares less about matching a keyword exactly and more about matching the intent behind it Google’s systems are good enough now to connect “cheap running shoes” with a page about “affordable running shoes” without you needing the exact phrase anywhere.
Keyword Cannibalization
When two or more pages on your own site compete for the same keyword, splitting your ranking signals instead of combining them into one strong page. I’ve fixed this for clients more than once by simply merging two thin, competing blog posts into one genuinely comprehensive one rankings improved almost immediately once Google stopped having to choose between them.
Keyword Difficulty
A tool-generated score estimating how hard it would be to rank for a given keyword, usually based on the backlink strength of pages currently ranking. Treat it as a rough guide, not gospel it can’t account for how good your specific content is going to be, only how strong the current competition looks on paper.
Keyword Research
The process of finding what your actual audience searches for, and how often, before you write anything. Good keyword research answers a business question (“what are people actually asking that we can genuinely help with”), not just a volume question (“what has the biggest search number”).
L
Largest Contentful Paint (LCP)
One of the three Core Web Vitals it measures how long it takes for the largest visible element (usually a hero image or heading) to fully load. Google’s benchmark for “good” is under 2.5 seconds; slower than that and you’re measurably losing both users and ranking potential.
Link Building
The active practice of earning or acquiring backlinks from other websites. The honest version of link building is slow genuine outreach, real relationships, content worth linking to which is exactly why so many shortcuts (link farms, paid link networks) exist and why most of them eventually get caught by a Google update.
Link Equity (“Link Juice”)
The value or authority a link passes from the linking page to the linked page. It’s not infinite on any given page a page linking to 200 other pages passes meaningfully less equity to each one than a page linking to 5, which is part of why bloated footer link sections are worth auditing.
llms.txt
An emerging convention a plain-text file at a site’s root for summarizing a site’s content in a format AI crawlers and language models can parse quickly, similar in spirit to robots.txt or a sitemap. It’s not an official Google standard, but it’s gaining adoption as sites try to make themselves more legible to AI systems specifically.
Local SEO
Optimizing a business’s online presence to rank in location-based searches the “map pack,” “near me” searches, and local organic results. It leans on a different mix of signals than standard SEO: Google Business Profile completeness, review signals, and NAP consistency matter more here than almost anywhere else.
Long-Tail Keyword
A longer, more specific search phrase “best digital marketing agency for D2C skincare brands in Ahmedabad” instead of “digital marketing agency.” Lower individual search volume, but usually much higher intent and much less competition, which is why a content strategy built entirely on long-tail terms can outperform one chasing a handful of huge, brutally competitive head terms.
M
Meta Description
The short summary (ideally 150-160 characters) that can appear under your page’s title in search results. It’s not a direct ranking factor, but it’s your pitch for the click Google will sometimes rewrite it anyway if it thinks a different snippet answers the query better, which is worth knowing before you obsess over the exact wording.
Meta Title (Title Tag)
The HTML title of a page shown as the clickable blue link in search results and in the browser tab. It’s one of the clearest on-page relevance signals you control directly, which is why a title that’s vague, truncated (over ~60 characters), or keyword-stuffed is such an easy, common mistake to fix.
Mobile-First Indexing
Google’s practice of using the mobile version of your site not the desktop version as the primary basis for indexing and ranking. If your mobile site is missing content, links, or structured data that your desktop site has, Google is effectively ranking you on the weaker version.
N
NAP (Name, Address, Phone)
Your business’s core identity details, and specifically how consistently they appear across your website, Google Business Profile, and every other directory or citation. Inconsistent NAP a suite number here, missing there, an old phone number on one directory quietly undermines local SEO trust signals in a way that’s easy to overlook and tedious, but important, to fix.
No-Index Tag
A meta tag (noindex) telling search engines not to include a specific page in their index, even if it’s crawled. Useful for thank-you pages, internal search results, or duplicate filter pages pages that should exist for users but have no business showing up in search.
O
Off-Page SEO
Everything that influences your rankings but happens outside your own website backlinks, brand mentions, reviews, social signals. It’s the half of SEO you can’t fully control, which is exactly why the on-page and technical half deserves to be genuinely solid first you’re not going to out-link-build a site that Google can’t even crawl properly.
On-Page SEO
Everything on your own pages that you directly control content quality, title tags, headings, internal links, page speed, structured data. This is where I tell almost every new client to start, because it’s the highest-control, fastest-to-fix half of SEO, before spending a rupee on anything external.
Organic Traffic
Visitors who arrive at your site through unpaid search results, as opposed to paid ads, social, referral, or direct traffic. It’s the metric most SEO work ultimately aims to grow, though I always push clients to also track what that traffic actually does once it arrives traffic without conversions is a vanity number.
Orphan Page
A page on your site with no internal links pointing to it from anywhere else on the site. It might still be indexed if Google found it another way (an old sitemap entry, an external link), but functionally it’s invisible to your own site’s navigation and usually a sign something got disconnected during a redesign.
P
Page Speed
How quickly a page loads and becomes usable related to, but not identical to, Core Web Vitals, which measure specific, standardized aspects of speed and responsiveness. A page can score well on a generic speed test and still fail Core Web Vitals on real user data, which is why we always measure both.
PageRank
Google’s original algorithm for scoring a page’s importance based on the quantity and quality of links pointing to it, published back in 1998. The concept still underlies modern link evaluation even though the original public PageRank score was retired years ago “PageRank” as a public-facing number doesn’t exist anymore, but the idea absolutely still does.
Passage Indexing
Google’s ability to rank and surface a specific section (“passage”) of a page for a query, rather than only ever ranking whole pages. It’s part of why a single long, comprehensive page can outrank several shorter competing pages Google can find and surface the exact relevant passage instead of needing a whole page dedicated to that one narrow subtopic.
Q
Query (Search Query)
The actual words someone types or speaks into a search engine the raw input, as opposed to “keyword,” which is often how marketers describe the target version of that input in their own research. In Search Console data, “query” is the literal, real phrase a real person searched.
R
Rank Tracking
Monitoring where your pages rank for specific keywords over time, usually through a dedicated tool since Google increasingly personalizes and localizes results (meaning your own “check in an incognito tab” ranking check isn’t always what everyone else sees). Ranking data is noisy day-to-day the trend over weeks matters far more than any single day’s number.
Redirect (301 / 302)
A 301 redirect permanently sends visitors (and search engines) from one URL to another, passing along most of the original page’s ranking signals. A 302 signals a temporary move and is treated differently using a 302 for what’s actually a permanent change is a common mistake that can leave the old URL lingering in the index longer than it should.
Referring Domain
A unique website linking to yours distinct from total backlinks, since one site can link to you many times but only counts once as a referring domain. Ten links from ten different real websites are worth meaningfully more than fifty links from one site, which is exactly why referring domain count, not raw backlink count, is the number worth watching.
Rich Results (Rich Snippets)
Enhanced search listings with extra visual elements star ratings, prices, FAQs, recipe times powered by structured data (schema markup) on the page. They don’t directly boost rankings, but they meaningfully boost click-through rate, since they make your listing visually stand out against plain blue links around it.
Robots.txt
A plain-text file at your site’s root that tells well-behaved crawlers which parts of the site they’re allowed or not allowed to request. It’s a set of instructions, not a security wall a robots.txt “Disallow” doesn’t hide a page from someone who has the direct link, and Google can still index a disallowed URL if it’s linked to elsewhere, just without crawling its content.
S
Schema Markup (Structured Data)
Code (usually JSON-LD) added to a page that explicitly labels what things are this is a review, this is a price, this is an FAQ in a format search engines can parse with certainty rather than guessing from plain text. It’s the direct mechanism behind most rich results, and increasingly a signal AI systems use too, to extract specific facts from a page confidently.
SERP
Search Engine Results Page the page of results you get after searching. Modern SERPs are rarely just ten blue links anymore; they mix in AI Overviews, featured snippets, map packs, image carousels, and ads, all competing for the same attention above the organic results.
Site Architecture
How a website’s pages are organized and linked together its structural hierarchy, not its visual design. A flat, logical architecture (important pages reachable in 2-3 clicks from the homepage) helps both users and crawlers; a deep, tangled one buries content that Google may struggle to find or value properly.
Sitemap (XML Sitemap)
A file listing all the important URLs on your site, submitted to search engines to help them discover pages more efficiently especially useful for large sites or pages with few internal links pointing to them. A sitemap is a hint, not a guarantee; Google can still choose not to crawl or index a URL that’s listed in it.
Spam Score
A third-party metric (most commonly Moz’s) estimating how likely a site is to be penalized or already flagged as spam, based on patterns common among sites Google has penalized in the past. Like Domain Authority, it’s not a Google score useful as a quick risk sniff-test on a potential link partner, not a verdict.
T
Technical SEO
The foundational layer of SEO crawlability, indexability, site speed, mobile-friendliness, structured data, security that makes it physically possible for search engines to access and understand your content properly. It’s the least glamorous part of the job and, in my experience, the part most likely to be silently broken on sites that otherwise “look fine.”
Topical Authority
The degree to which Google (and increasingly AI systems) trust a site as a genuine, comprehensive source on a given subject, built through consistently thorough, accurate coverage of a topic over time rather than one-off posts. It’s less “how many articles do you have” and more “does your coverage of this topic actually hang together as expertise.”
TTFB (Time to First Byte)
The time between a browser requesting a page and receiving the very first byte of data back from the server a pure server-response-speed metric, before any rendering happens. A slow TTFB (often a hosting or server-configuration problem) drags down every other speed metric downstream of it, which makes it one of the first things worth checking when a whole site feels sluggish.
U
URL Structure
How a page’s web address is organized /blog/local-seo-guide/ versus /page?id=4829&cat=12. Clean, readable, keyword-relevant URLs help both users and search engines understand what a page is about at a glance, and they age much better than parameter-heavy URLs that break or change with every backend update.
User Intent
The actual underlying goal behind a search query informational (wanting to learn), navigational (wanting a specific site), transactional (wanting to buy), or commercial investigation (comparing options before buying). Matching content to the real intent behind a keyword matters more than matching the keyword’s exact wording; a “buy” page targeting an “informational” query will struggle no matter how well-optimized it is.
W
White Hat / Black Hat SEO
White hat SEO follows search engines’ published guidelines genuine content, honest links, real technical fundamentals. Black hat SEO exploits loopholes and shortcuts keyword stuffing, link farms, cloaking chasing fast results with the ongoing risk of a manual action or algorithmic penalty wiping it all out. Every black hat tactic I’ve seen eventually got caught by some update; it’s just a matter of when.
Word Count
The total number of words on a page and one of the most overrated numbers in SEO. There’s no magic word count that guarantees rankings; what matters is whether the page is genuinely comprehensive for the topic and intent, which sometimes means 500 words and sometimes means 3,000.
Z
Zero-Click Search
A search where the user gets their answer directly on the results page through a featured snippet, AI Overview, or knowledge panel without clicking through to any website. Zero-click searches are growing, which is exactly why being clearly cited as the source of a zero-click answer (via GEO/AEO best practices) is starting to matter almost as much as the click itself.
Didn’t find a term here? Ask us and we’ll likely add it.
FAQs
What’s the difference between SEO and GEO?
SEO optimizes for traditional search engine rankings; GEO (Generative Engine Optimization) optimizes for being found and cited by AI tools like ChatGPT and AI Overviews. They overlap heavily clear structure and real expertise help both but GEO adds specific attention to things like AI-crawler accessibility that classic SEO didn’t need to think about.
Is Domain Authority a real Google ranking factor?
No. Domain Authority is Moz’s own third-party metric, not something Google calculates or uses. It’s a useful relative benchmark against competitors, but Google has stated directly that it doesn’t factor into rankings.
Why isn’t E-E-A-T listed as a ranking factor here?
Because it isn’t one, and we’d rather be accurate than repeat a common misconception. Google has said E-E-A-T informs the signals its ranking systems use it’s a quality framework for human raters, not a score plugged directly into the algorithm.
How often is this glossary updated?
Whenever a new term becomes common enough that clients start asking about it which, with AI search moving as fast as it is right now, has been fairly often lately.
