Here is the recent timeline of keyword ranking of my site
On 12th May , my site was ranked number one on 1500 keywords On 20th May , it ranked number one on 1900 keywords. Rank upgraded. On 2nd June, it ranked number one on 800 keywords. Rank downgraded
Not sure what is happening here and how should I get RCA of it. Looks like google has started rolling out google core web vitals changes after 20th may , can it be because of that ?
Also are core web vitals changes are only related to site performance or other factors also like E-A-T/Content quantity and quality etc ?