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Glossary Term
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Core Web Vitals

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

Related Service: SEO Services

Core Web Vitals: Google's Speedometer

Core Web Vitals (CWV) are a set of three specific metrics that Google considers critical for a healthy user experience. They are a confirmed ranking factor.

The Big Three

  • LCP (Largest Contentful Paint): Loading speed. How fast does the main content (hero image or headline) appear? Goal: < 2.5s.
  • INP (Interaction to Next Paint): Responsiveness. When you click a button, how fast does the browser react? (Replaced FID in March 2024). Goal: < 200ms.
  • CLS (Cumulative Layout Shift): Visual Stability. Does the page jump around while loading, causing you to click the wrong thing? Goal: < 0.1.

How to pass

  • Optimize images (Next.js Image component, WebP).
  • Defer non-essential JavaScript.
  • Reserve space for ads and images so they don't push content down.

More Technical terms

Browse related definitions in the same glossary category.

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Canonicalisation

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Crawl Budget

Algorithm

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

Algorithm Update

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

AMP (Accelerated Mobile Pages)

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

API Quotas

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

API Rate Limits

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

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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