SEO & Content Marketing Glossary

A/B Testing

A controlled experiment in which two or more versions of a web page, email, or element are shown to different audience segments to determine which performs better against a defined metric.

A2A Protocol

An open standard introduced by Google in April 2025 that enables AI agents to discover, communicate with, and delegate tasks to each other autonomously across different platforms and vendors.

AI Agent

An AI system that can autonomously plan and execute multi-step tasks by using tools, making decisions, and taking actions in a sequence — going beyond single-turn question-and-answer to complete complex workflows with minimal human intervention.

AI Content Generation

The use of large language models (LLMs) and related AI technologies to automatically produce written content such as blog articles, product descriptions, social media posts, and SEO copy.

Alt Text

The `alt` attribute of an HTML `<img>` element — a text description of an image that displays when the image fails to load, assists screen readers for visually impaired users, and helps search engines understand image content.

Anchor Text

The clickable, visible text of a hyperlink — the words a user sees and clicks to follow a link, which signals to search engines what the destination page is about.

Backlink

A hyperlink from one website pointing to a page on another website, used by search engines as a signal of authority and trust.

Bounce Rate

The percentage of sessions in which a user visits only one page on your website and leaves without interacting further, as measured by Google Analytics.

Breadcrumbs

A navigation element showing the user's location within a website's hierarchy (e.g., Home > Blog > SEO > Keyword Research), which also appears in Google search results when properly marked up with structured data.

Broken Link Building

A link building tactic where you find dead links on other websites that point to non-existent pages, create or identify equivalent content on your site, then notify the webmaster and suggest your page as a replacement.

Call to Action

A prompt — typically a button, link, or directive phrase — that encourages a user to take a specific next step, such as signing up, downloading, buying, or contacting — designed to convert visitors into leads or customers.

Canonical URL

An HTML tag that tells search engines which version of a page is the preferred, authoritative URL when multiple URLs serve the same or very similar content.

Click-Through Rate (CTR)

The percentage of users who click on a search result after seeing it in the SERP, calculated as (clicks ÷ impressions) × 100.

Content Audit

A systematic review of all existing content on a website to evaluate performance, identify gaps, and decide what to update, consolidate, or remove.

Content Brief

A document that outlines the goals, target keyword, audience, structure, and requirements for a piece of content before writing begins — serving as the blueprint that aligns strategy, writers, and editors.

Content Calendar

A planning tool that schedules when and where content will be published, coordinating topics, formats, channels, and deadlines across a content team.

Content Distribution

The process of sharing and promoting content through multiple channels — including organic search, social media, email, syndication, and paid promotion — to maximize reach beyond direct site visitors.

Content Gap

Topics, questions, or user needs that your site's content does not address but that your audience actively searches for — representing missed opportunities that competitors or other sources are capturing.

Content Length

The word count or depth of a piece of web content — a factor that influences how comprehensively a page covers its topic, affects user engagement, and correlates (without directly causing) with higher search rankings.

Content Pillar

A comprehensive, authoritative piece of content that covers a broad topic in depth and serves as the hub for a cluster of related, more specific articles that link back to it.

Content Repurposing

The practice of adapting existing content into new formats or for different channels — such as turning a blog post into a video, podcast episode, infographic, or social media series — to extend reach without creating entirely new content.

Conversion Rate

The percentage of visitors who complete a desired action (purchase, sign-up, download, inquiry) on a website — calculated as conversions divided by total visitors multiplied by 100.

Core Web Vitals

Google's set of real-world user experience metrics — Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS) — used as ranking signals in the Page Experience update.

Crawl Errors

Problems that search engine crawlers encounter when attempting to access and process pages on a website — including HTTP errors (404, 500), redirect issues, and DNS failures — which prevent pages from being properly indexed.

Crawlability

The ability of search engine bots to access, navigate, and read the pages on your website without encountering technical barriers.

Digital PR

A link building and brand awareness strategy that earns high-quality editorial backlinks from news outlets, industry publications, and authoritative websites by creating and distributing genuinely newsworthy content — such as original research, data studies, or compelling stories.

Domain Authority

A third-party score (0–100) developed by Moz that predicts how likely a website is to rank in search engine results pages based on its backlink profile.

Duplicate Content

Substantively identical or very similar content that appears on multiple URLs, either within the same site or across different sites, which can confuse search engines about which version to index and rank.

Dwell Time

The amount of time a user spends on a page after clicking on it from search results, before returning to the search results page — used as an indirect indicator of content satisfaction and relevance.