What are the Core Web Vitals?
The Core Web Vitals are a subset of performance metrics that should make it easier to check your website's health. The Largest Contentful Paint (LCP) measures loading performance. it should occur within 2.5 seconds of when the page first starts loading. First Input Delay (FID) measures interactivity. Pages should have an FID of less than 100 milliseconds. The Cumulative Layout Shift (CLS) measures visual stability. Pages should maintain a CLS of less than 0.1.
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