The new update is called the Google Page Experience
WHAT: this includes things like:
📱 Is it mobile-friendly?
⏳ Does it load quickly?
🔒 Does it run on HTTPS?
📺 Are there intrusive ads present?
🔎 Does content jump around as the page is loading?
HOW : The metrics :
1- LCP — Largest Contentful Paint:
Measures loading performance to provide great user experience
>> in just 2.5 seconds
2 -FID — First Input Delay:
This measures inactivity, and to provide a good UX
>> under 100 milliseconds.
3- CLS — Cumulative Layout Shift:
Designed to measure visual stability.
>> keep CLS of under 0.1.
More about it :
https://www.igoseo.fr/blog/sxo-ux-seo-complementaire/