Core Web Vitals

Le metriche reali di Google per velocità di caricamento, reattività e stabilità visiva.

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In parole semplici

Core Web Vitals measure loading, responsiveness, and layout stability using real-user data when enough is available.

Lab tests help diagnose issues; field data reflects real visits. These metrics cannot guarantee rankings or overall quality.

Le fondamenta

What matters in Core Web Vitals

LCP — loading

Largest Contentful Paint measures main-content loading. Good: 2.5 seconds or less at the 75th percentile.

INP — responsiveness

Interaction to Next Paint measures responsiveness. Good: 200 milliseconds or less at the 75th percentile.

CLS — stability

Cumulative Layout Shift measures unexpected movement. Good: 0.1 or less at the 75th percentile.

Applicato da The Forge

Come lo mettiamo in pratica

We use these measures to reduce waiting and keep pages responsive and stable.

Deliver the important content early

Use server rendering, caching, optimised images, and deliberate loading priorities.

Keep interactions responsive

Limit JavaScript and long tasks so controls respond quickly.

Reserve visual space

Reserve media dimensions and manage font loading to reduce layout shifts.

Measure lab and field data

Use lab tests to diagnose issues and field data to understand real visits.

Un limite utile

Limiti da tenere presenti

  • Core Web Vitals are not the same thing as a Lighthouse performance score.
  • Passing the thresholds does not guarantee rankings, conversions, or a satisfying overall experience.
  • A single local test cannot represent the range of real devices, networks, pages, and visitors.

Un esempio concreto

A stable service landing page

A service page loads its main content early, reserves image space, and responds quickly. Field data checks the experience of real visitors.

Approfondimenti

Fonti primarie

Consulta le fonti alla base di queste spiegazioni.

Understanding Core Web Vitals and Google search resultsGoogle Search CentralWeb Vitalsweb.dev

Concetto correlato

Analytics & conversions: Analytics e conversioni

Misurare l'uso del sito nel rispetto delle scelte dei visitatori per capire cosa li aiuta a compiere passi utili.