The Complete Guide to SEO Terms You Should Know

A permanent redirect from one URL to another, used to pass SEO value to a new page.

A temporary redirect that tells search engines the original page will be back.

A “Page Not Found” error shown when a webpage doesn’t exist anymore.

The portion of a webpage visible without scrolling; crucial for capturing user attention.

A Google-backed project designed to make web pages load faster on mobile devices.

The number of times an advertisement is displayed, regardless of clicks.

Ensuring web content is accessible to individuals with disabilities, aligning with the Americans with Disabilities Act.

Answer Engine Optimization — optimizing content so AI answer engines cite it directly in generated responses.

AI systems that autonomously plan and execute multi-step tasks with tools, memory, and reasoning loops.

A web crawler used by Ahrefs to index web pages and links.

Goal-driven programs that use LLMs plus tools (browsers, APIs, code) to complete tasks with minimal human input.

A web development technique that allows web pages to update asynchronously by exchanging data with a web server behind the scenes.

A set of rules used by search engines to rank web pages in search results.

Changes made by search engines to their ranking algorithms, impacting website rankings.

HTML attribute providing alternative text for images, aiding accessibility and SEO.

Descriptive text for images that helps search engines understand visual content.

The collection and analysis of data regarding website usage to inform decisions.

The clickable text in a hyperlink; important for keyword relevance in SEO.

The practice of rewriting content to create multiple versions, often used in blackhat SEO.

Republishing content on third-party sites to reach a broader audience.

The perceived credibility and trustworthiness of a website, influencing its ranking.

A trusted, high-quality website with strong backlinks and good SEO metrics.

Content created automatically by software, often lacking quality and depth.

A link from another website pointing to your site, essential for SEO.

A free service by Microsoft to help monitor and maintain a site’s presence in Bing search results.

The web crawler used by Bing to index web content.

Unethical SEO practices that violate search engine guidelines.

The percentage of visitors who leave a site after viewing only one page.

Search terms that include a brand’s name or variations.

A navigational aid showing users their location within a site’s hierarchy.

Navigation links that show users and search engines where they are on a site.

A web page created solely to redirect visitors to another site, often used in affiliate marketing.

A hyperlink that leads to a non-existent or unavailable web page.

Stored versions of web pages to reduce server load and speed up loading times.

A tag that tells search engines which version of a page is the original.

The preferred version of a web page when multiple versions exist, preventing duplicate content issues.

The percentage of online shoppers who add items to their cart but do not complete the purchase.

A domain extension specific to a country, such as .uk for the United Kingdom.

OpenAI's conversational LLM product; a major surface for AI search and content generation.

Anthropic's family of large language models used for chat, reasoning, coding, and long-context tasks.

The ratio of users who click on a specific link to the number of total users who view a page or email.

A blackhat SEO trick where different content is shown to search engines than users.

A schedule outlining when and where content will be published.

The process of gathering and sharing relevant content from various sources.

Creating and distributing valuable content to attract and engage a target audience.

Removing low-performing or outdated pages to improve site quality.

The percentage of visitors who complete a desired action on a website.

The number of pages a search engine will crawl on your site within a given timeframe.

A bot that systematically browses the internet to index web content for search engines.

The process search engines use to discover pages on the web.

A stylesheet language used to describe the presentation of a document written in HTML.

The ratio of users who click on a specific link to the number of total users who view a page or email.

The removal of a web page from a search engine’s index, making it no longer appear in search results.

A feature in Google Search Console that allows webmasters to tell Google to ignore certain backlinks.

A link that passes SEO value from the referring site to the linked site.

A metric by Moz that predicts how well a site will rank in search engines.

A metric developed by Moz to predict how well a website will rank on search engines.

Content that appears on multiple web pages, either within the same site or across different sites.

Expertise, Authoritativeness, Trustworthiness, is a concept used by Google to assess the quality of content and its creators.

The practice of optimizing online stores to improve visibility in search engine results.

Data points that measure how users interact with a website, such as time on site and pages per session.

A link that points to a page on a different website.

A summary of an answer to a user’s query displayed at the top of Google’s search results.

Generative Engine Optimization — the practice of getting content surfaced inside AI-generated answers.

Google Analytics or GA4 free tool by Google that provides insights into website traffic and user behavior.

Google’s web crawling bot that indexes web pages for the search engine.

A tool that allows businesses to manage their online presence across Google, including Search and Maps.

A theory that new websites are temporarily held back from ranking.

A free service by Google that helps monitor, maintain, and troubleshoot a site’s presence in Google Search results.

Writing content for another website to gain exposure and backlinks.

Publishing articles on other websites to gain backlinks and traffic.

HTML elements used to define headings and subheadings on a web page.

Text that’s invisible to users but visible to search engines; considered blackhat.

An HTML attribute that specifies the language and geographical targeting of a web page.

The standard language for creating web pages and web applications.

The process of adding a webpage into a search engine’s database.

A hyperlink that points to another page within the same website.

The practice of optimizing websites built with JavaScript for search engines.

A word or phrase that users enter into search engines to find information.

When multiple pages on the same site target the same keyword, causing competition between them and weakening SEO.

The number of times a keyword appears on a page compared to total word count.

A metric that indicates how hard it would be to rank for a specific keyword.

The process of finding relevant keywords your target audience is searching for.

Overusing keywords in content to manipulate rankings (blackhat tactic).

A standalone page created for a marketing or advertising campaign, optimized for conversions.

A method used by search engines to understand related keywords and context.

High-quality content designed to attract backlinks naturally.

The process of getting other websites to link to your site to improve authority.

The value or ranking power passed from one site to another through links.

A blackhat SEO tactic where a group of websites excessively link to each other to boost rankings.

The SEO value passed from one page to another via backlinks.

A collection of all the backlinks pointing to a website. A diverse and clean link profile supports SEO health.

Large Language Model — a neural network trained on massive text to generate and understand language.

A proposed standard file that gives LLMs and AI crawlers a curated map of a site's key content.

Optimization efforts that help businesses appear in local search results.

A more specific, longer search phrase with lower competition but higher conversion potential.

Related terms and phrases that give context to your main keyword.

A penalty issued by Google when a site violates its webmaster guidelines.

A Google action that lowers rankings for violating guidelines.

A short summary of a page that appears in search engine results.

An outdated tag once used to list targeted keywords—largely ignored by modern search engines.

Snippets of code in a webpage’s HTML that help search engines understand content.

Google’s approach of indexing the mobile version of a website over its desktop version.

Consistent business info across local listings; critical for local SEO.

The act of sabotaging a competitor’s rankings using unethical tactics like toxic backlinks.

Adding a backlink to an existing post or page; often used in blackhat or grayhat strategies.

A link that does not pass SEO value to the linked page.

An attribute on a link that tells search engines not to pass link equity to the target page.

A tag that tells search engines not to include a page in search results.

Optimization done outside your site (like link building and social signals).

Optimization of individual pages for keywords, structure, and user experience.

The AI research company behind ChatGPT, GPT models, and the API that powers many AI SEO tools.

Visitors who arrive at your site from unpaid (organic) search engine results.

A webpage with no internal links pointing to it, making it hard for search engines to discover.

A Moz metric predicting how well a specific page will rank on search engines.

Google’s set of signals measuring how users perceive the experience of interacting with a web page.

How fast a page loads, which impacts rankings and user experience.

A blackhat/grayhat tactic of publishing content on high-authority third-party sites to rank in SERPs.

A network of websites built to link to a main site and manipulate rankings—considered blackhat SEO.

A negative action taken by search engines that lowers a site’s rankings due to guideline violations.

An AI answer engine that blends LLM reasoning with real-time web search and inline citations.

A comprehensive page that covers a broad topic and links to more specific cluster content.

Crafting instructions that steer an LLM's output; core skill for AI SEO and content workflows.

A way to send users and search engines from one URL to another.

A series of multiple redirects from one URL to another; can hurt SEO.

A website that contains a backlink pointing to your site.

A file that tells search engine bots which pages to crawl or ignore.

Structured data added to a webpage to help search engines understand the content and enhance SERP features.

Content copied from other websites, often used in blackhat strategies.

A free tool that helps monitor and troubleshoot your site’s visibility in Google search.

A software system like Google or Bing that indexes, ranks, and retrieves content based on user queries.

The reason behind a user’s search—like finding info, buying, or navigating.

The number of times a specific keyword is searched for in a given timeframe.

Optimizing content to focus on meaning and related topics rather than just keywords.

A full analysis of a website’s SEO health and performance.

The page users see after searching on Google or Bing.

Organizing content into themed groups to strengthen topical authority.

A comprehensive analysis of a website’s SEO health, structure, and performance.

A file that lists all important URLs on a website to help search engines crawl and index them.

An SEO strategy where you find top-performing content, improve it, and promote your version.

A measure (from tools like Moz) indicating the likelihood that a site might be penalized.

A standardized format for providing information about a page and classifying the page content.

The process of optimizing your website’s infrastructure to help search engines crawl and index your content more effectively.

Pages with little or no value to users, often flagged by search engines as low-quality.

The clickable title shown in search engine results—crucial for SEO and CTR.

Low-quality or spammy links that can negatively affect rankings.

A backlink from a suspicious or spammy site that could harm your rankings.

The number of visitors coming to a website.

A metric that evaluates the quality of a site based on its backlink profile.

The readable part of a URL after the domain name.

The format of a URL that helps both users and search engines understand the content.

How easy and enjoyable a site is to use; a growing SEO factor.

Content created by users, such as comments or reviews—can be both beneficial or risky for SEO.

Building software by describing intent to an AI and iterating on generated code rather than writing it by hand.

Links built on platforms like Tumblr, Blogger, or Medium—often used in parasite SEO.

Platforms like Medium or Blogger used in parasite SEO for link building.

Ethical SEO practices that follow search engine guidelines.