Core web vitals

1. https://developers.google.com/speed/pagespeed/insights/

2. Google Search Console (Core Web Vitals report)

3. https://developers.google.com/web/tools/lighthouse/

4. https://webpagetest.org/

LCP (Largest Contentful Paint) metric is below or equal to 2.5 s

- tool 1

- tool 2

- tool 4

- rel=“preconnect” or rel=“dns-prefetch” op third-party connecties

FID (First Input Delay) score equal to or below 100 ms

- tool 1

- tool 2

- optimize the JavaScript parsing, compilation, and execution

CLS (Cumulative Layout Shift) equal to or below 0.1

- tool 1

- tool 2