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47 Terms

Technical Glossary

Technical SEO concepts including crawling, indexing, site architecture, and Core Web Vitals.

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Algorithm

A complex system used by search engines to retrieve data and deliver results for a query. Google uses multiple algorithms to rank websites.

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Algorithm Update

Changes made to a search engine's ranking algorithms that can impact website visibility and traffic.

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AMP (Accelerated Mobile Pages)

A framework that enables ultra-fast loading of mobile pages by simplifying HTML and limiting scripts.

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API Quotas

Hard limits on total API usage over a billing period, often tied to pricing tiers.

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API Rate Limits

Restrictions on how many API requests can be made within a time period, requiring throttling and retry logic.

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Broken Link

A hyperlink that no longer works because the destination page has been deleted or moved. Damages UX and SEO value.

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Build-Time Rendering

Generating HTML at build time (static site generation) rather than on each request, improving performance and SEO.

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Cache

Temporary storage of website data in a browser or CDN to improve load speed and reduce server requests.

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Cache Invalidation

The process of removing or updating cached content when source data changes, ensuring users see fresh content.

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Canonical Tag

HTML tag indicating the preferred URL when duplicate or similar pages exist. Helps consolidate SEO signals.

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Canonical URL

The preferred version of a web page when multiple URLs have similar content. Prevents duplicate content issues.

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Canonicalisation

The process of consolidating duplicate URLs to one preferred version for indexing.

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Core Web Vitals

Google's metrics for measuring user experience: loading speed (LCP), interactivity (FID), and visual stability (CLS).

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Crawl Budget

The number of pages search engine bots will crawl on your site within a given timeframe. Important for large websites.

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Crawl Errors

Problems encountered by search engine bots when trying to access pages, often due to broken links or blocked resources.

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Crawl Queue

The list of URLs search engines intend to crawl next, managed dynamically based on site authority and freshness.

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CSS (Cascading Style Sheets)

The code language used to control the look and layout of HTML pages.

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Duplicate Title

When multiple pages use the same title tag, making it difficult for search engines to differentiate them.

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FAQ Schema

Structured data that marks up question‑and‑answer content so search engines can show FAQs directly in search results where eligible.

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First Input Delay (FID)

A Core Web Vitals metric measuring responsiveness, how quickly a page reacts to user interactions.

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Hreflang Tag

HTML tag that indicates the language and regional targeting of a page for multilingual or international SEO.

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Index

The database where search engines store information about web pages. Getting indexed is necessary to appear in search results.

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ISR (Incremental Static Regeneration)

A Next.js feature that updates static pages after deployment without rebuilding the entire site.

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JavaScript SEO

The practice of ensuring search engines can crawl, render, and index JavaScript-powered sites, including handling client-side rendering, hydration, and dynamic content.

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JSON-LD

A JavaScript-based format for adding structured data markup to web pages, preferred by Google.

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Lighthouse

An open-source Google tool that audits web pages for performance, accessibility, and SEO best practices.

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Manual Action

A penalty applied by Google when a site violates webmaster guidelines, usually due to spammy or manipulative practices.

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Meta Robots Tag

An HTML tag that controls how search engines index and follow links on a page.

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Minification

The process of removing unnecessary code characters (spaces, line breaks) to improve page speed.

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Mobile-First Indexing

Google's practice of primarily using the mobile version of content for indexing and ranking.

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Navigation Depth

How many clicks it takes to reach a page from the homepage. Shallow structures improve crawlability and UX.

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Page Experience

A Google ranking signal based on Core Web Vitals, mobile usability, HTTPS, and intrusive interstitials.

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Page Speed

How quickly a web page loads. A critical ranking factor and user experience metric.

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Pagination

Dividing long lists of content or products across multiple pages, using rel='next' and rel='prev' tags for SEO clarity.

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Property Schema

Structured data type specifically describing hotels or lodgings, including amenities, check-in times, and pricing.

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Rate Limiting

Controlling the number of requests a user or client can make to an API within a time period to prevent abuse.

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Redirect

A method of forwarding users and search engines from one URL to another, commonly used after page migrations.

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Redirect Chain

A series of redirects that slow down page loading and dilute link equity. Should be simplified to one step.

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Robots.txt

A file that tells search engine crawlers which pages to crawl or ignore on your website.

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Schema Markup

Structured data code that helps search engines understand your content better. Enables rich snippets in search results.

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Search Console

Google's free toolset for monitoring website performance, crawling issues, and indexing status.

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Server Response Time

How long it takes for a web server to respond to a browser request. Impacts Core Web Vitals and UX.

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Sitemap

An XML file listing all important pages on your website. Helps search engines discover and crawl your content.

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Structured Data

Machine-readable code (often JSON-LD) providing additional context about content, enabling enhanced search results.

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Technical SEO Audit

A systematic review of a website's technical health - including crawlability, indexing, performance, and structured data.

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URL Structure

The format and organisation of your website's URLs. Clean, descriptive URLs are better for SEO and users.

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Viewport

The visible area of a web page on a user's device. Design elements should fit within this space for optimal UX.

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