For years, web performance monitoring has been driven by “browser-centric” metrics. Even if some of them have been heavily used and are still useful today to some extent, as the Page Load Time, the main issue they have in common is their inability to provide accurate data about how real users experience their web journey.
In order to address this challenge, Google announced in May 2020 the introduction of brand new web performance metrics that form the Core Web Vitals.
These Core Web Vitals focus on three important aspects of a real user experience:
To take a close look at them, we recommend that you read the following articles:
- Loading: Largest Contentful Paint (LCP)
- Interactivity: First Input Delay (FID)
- Visual Stability: Cumulative Layout Shift (CLS)