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Performance

Core Web Vitals (CWV)

A set of specific factors that Google considers important in a webpage's overall user experience.

Core Web Vitals are a set of real-world, user-centered metrics that Google uses to quantify key aspects of the user experience. They focus on three main areas: loading, interactivity, and visual stability.

The Three Pillars of Core Web Vitals

  1. Largest Contentful Paint (LCP): Measures loading performance. To provide a good user experience, LCP should occur within 2.5 seconds of when the page first starts loading.
  2. Interaction to Next Paint (INP): Measures responsiveness. It tracks the time it takes for a page to respond to user interactions like clicks or key presses.
  3. Cumulative Layout Shift (CLS): Measures visual stability. It quantifies how much the page content shifts unexpectedly during loading.

Improving these metrics is essential for both user satisfaction and search engine rankings.

More in Performance

LCP (Largest Contentful Paint)

A Core Web Vital that measures when the largest content element on a page becomes visible.

TTFB (Time to First Byte)

The time it takes for a user's browser to receive the first byte of data from the web server.