Web Development Intermediate

What is Web Vitals?

Google's metrics for measuring user experience quality, including loading speed, interactivity, and visual stability of web pages.

Core Web Vitals include: LCP (Largest Contentful Paint — loading, should be under 2.5s), INP (Interaction to Next Paint — interactivity, should be under 200ms), and CLS (Cumulative Layout Shift — visual stability, should be under 0.1).

Web Vitals are a Google ranking factor. Improve LCP with image optimization, CDNs, and preloading. Improve INP by reducing JavaScript execution time and breaking long tasks. Improve CLS by setting explicit dimensions on images/ads and avoiding dynamic content insertion above the fold.

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Related Terms

A communication protocol that enables full-duplex, real-time data exchange between a browser and server over a single connection.

Web Performance Optimization

Techniques to make websites load faster and respond more quickly, improving user experience and search engine rankings.

A mechanism in OAuth that limits an application's access to a user's account to specific resources or actions.

An XML file that lists all important URLs on a website, helping search engines discover and crawl content efficiently.

CDN (Content Delivery Network)

A distributed network of servers that delivers web content to users from the geographically closest location.

SEO (Search Engine Optimization)

The practice of optimizing websites to rank higher in search engine results, increasing organic traffic.

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