Technical SEO glossary terms.

Technical SEO 301 redirect A 301 redirect is an HTTP response that states a resource has moved permanently to the URL supplied in the Location header. Technical SEO 302 redirect A 302 redirect is an HTTP response indicating that a resource is temporarily available at the URL in its Location header. Technical SEO 304 Not Modified 304 Not Modified tells a client making a conditional request that its cached representation remains valid and need not be retransmitted. Technical SEO 404 error A 404 error is an HTTP client-error response indicating that the server cannot find the requested resource. Technical SEO 410 Gone 410 Gone is an HTTP client-error status stating that the requested resource is no longer available and the condition is likely permanent. Technical SEO 5xx Server Error A 5xx server error is an HTTP response in the 500–599 class indicating that the server failed to fulfill a valid request. Technical SEO API Crawl An API crawl collects website or platform data through an API rather than by visiting pages like a traditional web crawler. Technical SEO Article Schema Article Schema uses Article or a more specific subtype to describe a news, blog or other editorial page. Technical SEO Automated Schema Markup Automated Schema Markup generates structured data from templates and authoritative content or commerce fields instead of manual page-by-page entry. Technical SEO Blog post A blog post is an individual article published in a blog, usually written to answer a question, explain a topic, build authority or support organic acquisition. Technical SEO Blog SEO Blog SEO is a practical SEO term used to describe a specific website signal, workflow or optimization area that can influence organic visibility. Technical SEO Bot Crawl A bot crawl is the process of an automated crawler requesting pages and resources to discover, inspect or index website content. Technical SEO Breadcrumb Schema Breadcrumb Schema uses BreadcrumbList and ordered ListItem nodes to describe a page's position in a navigational path. Technical SEO Broken external link A broken external link is a hyperlink on an analysed source page whose resolved outside-boundary destination fails a declared availability rule at the recorded check time. Technical SEO Broken internal link A broken internal link is a link from one page on a site to another same-site URL that fails to reach its intended usable destination. Technical SEO Broken link A broken link is a hyperlink whose resolved destination fails to provide the intended resource to the tested user agent in a declared observation context. Technical SEO Browser Rendering Browser rendering converts a parsed document and its styles into positioned, painted and composited pixels on the screen. Technical SEO Cache Control Cache-Control is an HTTP header that tells browsers and intermediaries how long resources may be stored and reused before being requested again. Technical SEO Cache headers Cache headers are HTTP response fields that tell browsers and intermediaries whether, where and how long a representation may be reused. Technical SEO Canonical chain A Canonical chain exists when one page declares a canonical URL that itself declares another canonical URL, creating two or more annotation hops. Technical SEO Canonical Management Canonical Management is the governed workflow for choosing intended representative URLs and aligning redirects, canonical annotations, internal links and sitemap entries with those decisions. Technical SEO Canonical tag A canonical tag is an HTML link element that identifies the preferred URL for a page when duplicate or very similar URLs exist. Technical SEO Canonical URL A Canonical URL is the representative address selected for a set of duplicate or sufficiently similar pages by a defined system. Technical SEO Canonicalization Canonicalization is the process of selecting one representative URL from a group of duplicate or substantially similar pages. Technical SEO Cart crawl control Cart crawl control describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed. Technical SEO Checkout crawl control Checkout crawl control describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed. Technical SEO Click Depth Click depth is the minimum number of crawlable internal-link selections needed to reach a target URL from a declared start page such as the homepage. Technical SEO Client Side Rendering Client Side Rendering creates substantial page HTML in the browser by executing JavaScript after the initial response arrives. Technical SEO Cloaking Cloaking presents materially different content to search engines and users with the intent to manipulate rankings and mislead people. Technical SEO Compression HTTP compression reduces representation bytes transferred between server and client using an encoding both endpoints support. Technical SEO Conflicting Sitemap Provider A conflicting sitemap provider is a plugin, theme or system that publishes sitemap URLs that compete with the preferred sitemap source. Technical SEO Content Fingerprinting Content fingerprinting creates a compact signature from an asset or text so systems can identify an exact version or estimate whether two items are substantially similar. Technical SEO Content Indexing Content indexing is the process by which search engines store and make webpage content eligible to appear in search results. Technical SEO Core Web Vitals Core Web Vitals are Google's current field-oriented metrics for loading performance, interaction responsiveness and visual stability: LCP, INP and CLS. Technical SEO Crawl A crawl is the process of discovering and requesting URLs so a search engine, SEO tool or agent can inspect website content and technical signals. Technical SEO Crawl Anomaly Crawl Anomaly describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed. Technical SEO Crawl budget Crawl budget is the set of URLs Google can and wants to crawl on a hostname, shaped by crawl capacity and crawl demand. Technical SEO Crawl Demand Crawl Demand describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed. Technical SEO Crawl depth Crawl depth is the number of clicks or link steps needed to reach a page from an important starting point such as the homepage. Technical SEO Crawl Diagnostics Crawl Diagnostics describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed. Technical SEO Crawl Efficiency Crawl Efficiency describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed. Technical SEO Crawl Errors Crawl errors are problems that prevent crawlers from accessing or processing URLs, such as 404s, server errors, blocked resources or redirect failures. Technical SEO Crawl Frequency Crawl Frequency describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed. Technical SEO Crawl Optimization Crawl Optimization describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed. Technical SEO Crawl Path Crawl Path describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed. Technical SEO Crawl Queue Crawl Queue describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed. Technical SEO Crawl Simulation Crawl Simulation describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed. Technical SEO Crawl Space Crawl Space describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed. Technical SEO Crawl stats Crawl stats are data about how crawlers access a website, including request volume, response codes, file types, timing and crawl activity. Technical SEO Crawl trap A crawl trap is a site pattern that exposes a crawler to a very large or effectively infinite set of low-value URL variations. Technical SEO Crawlability Crawlability is the degree to which a crawler can discover a URL, request it successfully and follow its useful links and resources. Technical SEO Crawlability Review A crawlability review checks whether search engines and AI crawlers can access, follow and understand the important parts of a website. Technical SEO Crawled Currently Not Indexed Crawled Currently Not Indexed is a Google Search Console status meaning Google visited a URL but has not chosen to include it in the index. Technical SEO Crawler A crawler is an automated bot that visits URLs, follows links and collects information for search engines, SEO tools or monitoring systems. Technical SEO Crawler Directives Crawler directives are instructions such as robots.txt rules, meta robots tags and HTTP headers that guide how bots crawl or index content. Technical SEO Crawling Crawling is the automated process of discovering URLs and requesting their content and resources from a web server. Technical SEO CSS Optimization CSS optimization reduces unnecessary stylesheet transfer, blocking, selector work and visual recalculation while preserving intended presentation. Technical SEO Cumulative Layout Shift Cumulative Layout Shift measures the largest burst of unexpected visible layout movements during a page visit. Technical SEO Custom Schema Custom Schema is project-specific structured-data implementation written beyond a theme or plugin's default output. Technical SEO Deep Crawl Deep Crawl describes how bots discover, request or evaluate website URLs, which affects whether important pages can be found and processed.