SEO comes with its own vocabulary, and a lot of it gets thrown around without explanation. This glossary covers the terms you'll actually run into — organized by category, defined in plain language.
Keyword Research
Keyword Research — the process of finding the actual words and phrases people type into search engines, used to guide content and SEO strategy.
Seed Keyword — a broad, foundational keyword used as a starting point for deeper keyword research (e.g. "shoes" before narrowing to "running shoes for flat feet").
Long-Tail Keyword — a longer, more specific search phrase (e.g. "best running shoes for flat feet in Delhi") — typically lower search volume but higher intent and easier to rank for.
Short-Tail Keyword — a broad, one-or-two-word search term (e.g. "shoes") — high volume, high competition, and often ambiguous intent.
Search Intent — the underlying reason behind a search: informational, navigational, transactional or commercial-investigation. Matching content to intent is often more important than matching exact keywords.
Search Volume — an estimate of how many times a keyword is searched in a given period, usually monthly.
Keyword Difficulty (KD) — a score (varies by tool) estimating how hard it would be to rank on page one for a given keyword.
CPC (Cost Per Click) — the amount an advertiser pays each time someone clicks their ad; also used as a rough proxy for a keyword's commercial value in SEO research.
Search Results & SERP Features
SERP — Search Engine Results Page; the page of results Google shows for a given query.
Organic Traffic — visitors who arrive at your site through unpaid search results, as opposed to paid ads.
Organic Ranking — where your page appears in unpaid search results for a given query.
Featured Snippet — a highlighted answer box shown above regular results, pulled directly from a ranking page's content.
AI Overview — Google's AI-generated summary shown at the top of some search results, synthesizing information from multiple sources.
Rich Results — enhanced search listings (star ratings, images, prices) generated from structured data markup on a page.
Knowledge Panel — an information box (usually on the right side of desktop search results) summarizing facts about a specific entity — a business, person or topic.
Local Pack — the map-and-listings block showing 3 local businesses for location-based searches, pulled largely from Google Business Profile data.
People Also Ask (PAA) — an expandable box of related questions shown within search results, often a useful source of content ideas.
Image SEO — optimizing images (file names, alt text, compression, structured data) to improve visibility in image search and page load speed.
Video SEO — optimizing video content and metadata to improve visibility in video search results and video-specific SERP features.
News SEO — SEO practices specific to getting news content into Google News and top-stories carousels, with an emphasis on speed and authority.
Types of SEO
On-Page SEO — optimization done directly on your website's pages: content, titles, headings, internal links.
Off-Page SEO — optimization activities happening outside your website, primarily backlink building and brand mentions.
Technical SEO — the behind-the-scenes work — site speed, crawlability, indexing, structured data — that lets search engines properly access and understand your site.
Local SEO — SEO focused on ranking for searches tied to a specific geographic area, heavily reliant on Google Business Profile and local citations.
International SEO — SEO structured for multiple countries or languages, including hreflang implementation and region-specific content.
E-commerce SEO — SEO tailored to online stores: product and category page optimization, structured data, and managing duplicate content from product variants.
Mobile SEO — optimization ensuring a site performs well on mobile devices, critical since Google primarily indexes the mobile version of sites.
Enterprise SEO — SEO practiced at large scale, typically involving thousands of pages, cross-team coordination and more complex technical infrastructure.
Programmatic SEO — generating large numbers of pages from structured data/templates (e.g. location or product-variant pages), aimed at capturing long-tail search demand at scale.
Semantic SEO — optimizing for the meaning and context behind search queries, not just exact-match keywords — helping search engines understand topical relevance more broadly.
Content Strategy
Topical Authority — the degree to which a site is seen as a comprehensive, trustworthy source on a specific subject, built through consistent, in-depth coverage.
Content Cluster — a group of related content pieces organized around a central topic, interlinked to demonstrate topical depth.
Pillar Page — a comprehensive page covering a broad topic, linking out to more specific related pages (cluster content).
Topic Cluster — the broader content model combining a pillar page with its linked cluster content.
Evergreen Content — content that stays relevant and useful over a long period, without needing frequent updates.
Cornerstone Content — a site's most important, comprehensive pages — usually the ones you most want to rank and that other content links back to.
Duplicate Content — identical or near-identical content appearing on multiple URLs, which can dilute rankings or confuse search engines about which version to show.
Thin Content — pages with little substantive value — too short, too generic, or providing minimal unique information.
Content Gap — topics or keywords your competitors rank for that your site doesn't yet cover.
Content Pruning — removing or consolidating low-performing, outdated or thin pages to improve a site's overall quality signals.
On-Page Elements
Meta Title — the clickable headline shown in search results for a page, set in the page's HTML <title> tag.
Meta Description — the short summary shown below a title in search results, meant to encourage clicks (not a direct ranking factor, but influences click-through rate).
URL Slug — the readable part of a URL after the domain (e.g. /blog/seo-glossary), ideally short and keyword-relevant.
Canonical Tag — an HTML tag telling search engines which version of a page is the "master" copy when duplicate or near-duplicate content exists.
H1 Tag — the main heading of a page, typically matching or closely related to the page's core topic.
H2 / H3 Tags — subheadings used to structure content hierarchically beneath the H1, aiding both readability and search engines' understanding of structure.
Alt Text — a text description attached to an image, read by screen readers and used by search engines to understand image content.
Anchor Text — the clickable, visible text of a hyperlink — its wording gives search engines context about the linked page's topic.
Links & Authority
Internal Linking — links between pages on the same website, helping distribute authority and guide both users and search engines through a site's structure.
External Linking — links from your content to other websites, which can support credibility when pointing to authoritative sources.
Backlinks — links from other websites pointing to yours — one of the most significant off-page ranking factors.
Link Building — the deliberate practice of earning or acquiring backlinks from other sites.
Referring Domains — the number of unique websites linking to yours (distinct from total backlink count, since one domain can link multiple times).
Domain Authority (DA) — a third-party (Moz) metric estimating a site's overall ranking strength on a 1–100 scale.
Page Authority (PA) — the same Moz methodology applied to an individual page rather than a whole domain.
Domain Rating (DR) — Ahrefs' equivalent metric to Domain Authority, estimating a site's backlink profile strength.
URL Rating (UR) — Ahrefs' page-level equivalent to Page Authority.
Toxic Backlinks — low-quality or spammy links that can potentially harm a site's rankings rather than help them.
Nofollow Link — a link with a rel="nofollow" attribute, signaling to search engines not to pass ranking credit through it.
Dofollow Link — a standard link with no nofollow attribute, passing ranking credit by default.
Sponsored Link — a link marked with rel="sponsored", used to disclose paid or advertising relationships per Google's guidelines.
UGC Link — a link marked with rel="ugc", used for links within user-generated content like comments or forum posts.
Broken Link — a link pointing to a page that no longer exists, resulting in a 404 error — bad for both user experience and crawl efficiency.
Link Equity — the ranking value passed from one page to another through a link, influenced by factors like the linking page's authority and relevance.
Crawling & Indexing
Crawl Budget — the number of pages a search engine will crawl on your site within a given timeframe, more relevant for very large sites.
Crawling — the process by which search engines discover pages by following links.
Indexing — the process of a search engine storing and organizing a crawled page so it can appear in search results.
Rendering — the process of a search engine executing a page's code (especially JavaScript) to see the final, fully-loaded content.
Robots.txt — a file at a site's root telling search engine crawlers which parts of the site they should or shouldn't access.
XML Sitemap — a machine-readable file listing a site's URLs, helping search engines discover and prioritize pages for crawling.
HTML Sitemap — a human-readable page listing a site's structure, primarily for user navigation rather than crawler instructions.
Canonicalization — the process of selecting a single, authoritative URL among multiple similar versions of a page.
Pagination — splitting long content or listings across multiple pages (page 1, 2, 3...), which needs careful handling to avoid duplicate-content issues.
Redirect (301) — a permanent redirect, telling search engines and browsers a page has moved permanently — passes most ranking value to the new URL.
Redirect (302) — a temporary redirect, indicating the move isn't permanent — generally doesn't pass ranking value the same way a 301 does.
HTTP Status Codes — server response codes (200 OK, 301/302 redirects, 404 Not Found, 500 Server Error) indicating the outcome of a page request.
Structured Data
Schema Markup — code added to a page (typically JSON-LD) that explicitly tells search engines what the content represents — a product, article, FAQ, and so on.
Structured Data — the broader term for organized, machine-readable data (schema markup being the most common implementation) added to help search engines understand content.
Breadcrumb Schema — structured data marking up a page's breadcrumb navigation, which can be shown directly in search results.
FAQ Schema — structured data marking up question-and-answer content, which can generate expandable FAQ results in search.
Product Schema — structured data describing product details (price, availability, reviews) for richer e-commerce search listings.
Organization Schema — structured data describing a business entity — name, logo, contact details, social profiles — supporting knowledge panel eligibility.
Performance & Core Web Vitals
Core Web Vitals — Google's set of specific page-experience metrics (LCP, INP, CLS) used as part of ranking signals.
LCP (Largest Contentful Paint) — measures how long it takes for the largest visible content element to load — a speed/loading metric.
INP (Interaction to Next Paint) — measures responsiveness — how quickly a page responds to user interaction (replaced First Input Delay as a Core Web Vital).
CLS (Cumulative Layout Shift) — measures visual stability — how much content unexpectedly shifts position as a page loads.
Page Speed — the general measure of how quickly a page loads and becomes usable, influencing both rankings and user experience.
Mobile Friendliness — how well a page functions and displays on mobile devices — a baseline requirement given mobile-first indexing.
HTTPS — the secure, encrypted version of HTTP; a confirmed (if minor) ranking factor and a baseline trust signal for users.
Trust & Authority Signals
E-E-A-T — Experience, Expertise, Authoritativeness, Trustworthiness — Google's framework for assessing content quality, especially for topics that can affect health, finances or safety (YMYL topics).
Tools & Metrics
Google Search Console (GSC) — Google's free tool for monitoring a site's search performance, indexing status and technical issues.
Google Analytics 4 (GA4) — Google's current analytics platform for tracking website traffic, behavior and conversions.
Google Business Profile (GBP) — the free business listing that powers local search visibility and the local map pack.
Click-Through Rate (CTR) — the percentage of people who click your result after seeing it, calculated as clicks divided by impressions.
Bounce Rate — the percentage of visitors who leave after viewing only one page, without further interaction (interpretation varies by context and tool).
Conversion Rate — the percentage of visitors who complete a desired action — a purchase, form submission, or booking.
Impression — a single instance of your page appearing in search results, whether or not it was clicked.
Sitemap Submission — the act of submitting your XML sitemap to Search Console, helping search engines discover your site's pages more efficiently.
SEO Audit — a comprehensive review of a site's technical health, on-page content and backlink profile, producing a prioritized list of issues and opportunities.
Bookmark this page as a reference — SEO terminology gets thrown around constantly, and having clear, accurate definitions on hand makes it much easier to evaluate advice (including ours) critically. If you'd like a professional audit applying these concepts to your actual site, our SEO services start with exactly that kind of assessment.
Growth Hub Media Team
Growth Hub Media is a Delhi-based digital agency covering website development, SEO, Google Ads and AI automation for businesses across India and worldwide.