All SEO Terms
Learn about important SEO terms and how AiSEO checks each factor.
On-Page SEO
On-Page SEO refers to the practice of optimizing individual web page content and HTML source code to improve search rankings. This includes optimizing...
Structured Data (Schema.org)
Structured Data uses Schema.org vocabulary to mark up content in a machine-readable format. JSON-LD is the format recommended by Google. Supports type...
AI Citability
AI Citability measures how likely web content is to be extracted and cited by AI search engines (Google AI Overview, Bing Copilot, CocCoc AI) in their...
PageSpeed Insights
Google PageSpeed Insights (PSI) is a tool that measures web page loading performance. PSI combines lab data (Lighthouse) and real-world data (CrUX) to...
Chrome UX Report (CrUX)
Chrome UX Report (CrUX) is a public dataset of real user experience metrics collected from opted-in Chrome users. CrUX provides real-world Core Web Vi...
Largest Contentful Paint (LCP)
LCP measures the render time of the largest content element visible in the viewport. The LCP element is typically a hero image, video poster, or large...
First Input Delay (FID)
FID measures the delay from when a user first interacts (click, tap) to when the browser responds. FID reflects page responsiveness. Good threshold: ≤...
Cumulative Layout Shift (CLS)
CLS measures total unexpected layout shift throughout a page's lifetime. Layout shift occurs when elements change position without user interaction. G...
Core Web Vitals
Core Web Vitals are Google's set of 3 metrics measuring real user experience: LCP (loading), FID/INP (interactivity), CLS (visual stability). They are...
Google AI Overview
Google AI Overview (formerly SGE) is an AI feature that generates synthesized answers from multiple web sources, displayed at the top of search result...
Generative AI Performance (GSC)
Generative AI Performance is a new report in Google Search Console that measures how often your website content appears in Google Search AI features —...
Meta Tags
Meta tags are HTML elements in <head> that provide metadata about a web page. Most important: title tag (displayed on SERPs), meta description (search...
Robots.txt
Robots.txt is a text file at the domain root that instructs web crawlers which pages to crawl and which to skip. Uses User-agent, Allow, Disallow dire...
XML Sitemap
XML Sitemap is an XML file listing all important URLs on a website, helping search engines crawl efficiently. Includes URL, lastmod, changefreq, and p...
Semantic HTML
Semantic HTML uses HTML5 elements with meaning: <article>, <section>, <nav>, <header>, <footer>, <aside>, <main>, <figure>. Unlike <div>/<span> which ...
Google Search
Google Search is the world's largest search engine with 91% market share. Google uses 200+ ranking factors including content quality, backlinks, Core ...
Microsoft Bing
Bing is the world's second-largest search engine, particularly strong on Windows and Edge browser. Bing Webmaster Tools provides URL submission API an...
E-E-A-T (Experience, Expertise, Authoritativeness, Trust)
E-E-A-T stands for Experience, Expertise, Authoritativeness, and Trust. These are quality criteria Google uses to evaluate content — not a direct rank...
HTTPS & Web Security
HTTPS (HTTP Secure) uses TLS/SSL to encrypt data between browser and server. Key security headers: HSTS (forces HTTPS), CSP (Content Security Policy, ...
Open Graph & Social Meta
Open Graph (OG) is a metadata protocol created by Facebook that controls how web pages appear when shared on social media. Key tags: og:title, og:desc...
SERP (Search Engine Results Page)
SERP (Search Engine Results Page) is the page displayed when a user performs a search. Modern SERPs include: organic results, paid ads, featured snipp...
Lazy Loading & Image Optimization
Lazy loading defers image loading until they approach the viewport, improving initial load speed. HTML native: loading="lazy". Related: srcset for res...
Noindex, Nofollow & Robots Directives
Meta robots directives control how search engines process pages: noindex (exclude from index), nofollow (don't follow links), noarchive, noimageindex....
IndexNow
IndexNow is a protocol that lets websites instantly notify search engines when content changes, instead of waiting for crawl. Supported by Bing, Yande...