To improve your website or webapp performance you first need to know which metrics are essential. Web Vitals is an initiative by Google to provide unified guidance for quality signals that are essential to delivering a great user experience on the web.
The Core Web Vitals metrics: Largest Contentful Paint, First Input Delay, and Cumulative Layout Shift are now available in Experience under the Web Vitals screen. These metrics, as all others in Experience are measured in the field, based on data from real users.
Fig. 1. Web Vitals in Experience
If you are looking for Web Vitals as measured in a controlled lab environment, you can find these metrics in Synthetics under the Web Vitals screen for each of your Browser monitors. This is a good option for testing features that are not yet released to real users.
Fig. 2. Web Vitals in Synthetics