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

Static Site Generator (SSG)

A tool that generates a complete static HTML website from templates and content at build time, requiring no server-side processing.

A technique for making asynchronous HTTP requests from a web page without reloading the entire page.

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

Server-Sent Events

A server push technology that enables a server to send real-time updates to a browser over a single HTTP connection.

API (Application Programming Interface)

A set of rules and protocols that allows different software applications to communicate and exchange data.

Structured Data (Schema.org)

A standardized vocabulary for marking up web content so search engines can understand and display it as rich results.

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