Signaux Web Essentiels
proprietary metricLes Core Web Vitals sont des métriques de Google définies pour l'expérience utilisateur qui évaluent les performances de chargement, la réactivité de l'interaction et la stabilité visuelle à l'aide de données réelles de la page.
Technical explanation
The current metrics are Largest Contentful Paint for loading, Interaction to Next Paint for responsiveness, and Cumulative Layout Shift for visual stability. Recommended thresholds at the 75th percentile are LCP within 2.5 seconds, INP below 200 milliseconds, and CLS below 0.1.
Business relevance
Core Web Vitals help teams identify performance problems that affect usability, conversion, accessibility, and search experience. They create shared targets across design, development, and SEO.
Implementation example
A team improves LCP by optimising the hero asset, reduces INP by removing long JavaScript tasks, and prevents CLS by reserving dimensions for media and fonts.
Limitations and common misconceptions
Core Web Vitals are not a complete measure of user experience or a guarantee of rankings. Lab and field data differ, thresholds may evolve, and good scores cannot compensate for irrelevant or inaccessible content.
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