In April, Google updated how CLS metric in search console was calculated. Google made it more useful for sites so that your website’s CLS metric will be up in June in Search console Reports.
On 1st June, Google Posted
The CLS metrics have been updated to reflect a more accurate representation of layout shifts on the page. You might see changes in your page CLS statuses (mostly positive) reflecting this change.
Google posted it after the same message on April 13.
Barry Schwartz, from Search Engine Round Table, confirms the same with google where Jeffery Jose from Google reverted on over twitter.
Here is the Tweet mentioned:
June 1st changes are reflecting the updated CLS definition as described in the https://t.co/FKr2xiuzhj post. It took a few weeks of work to plumb the update through from CrUX to SC.
— Jeffrey Jose (@jeffjose) June 1, 2021
Google do so, that users can see improvements in their CLS Score without performing anything.
You can also check your Core Web Vitals Reports in Search Console & expect the more green bars in CLS Metrics.
Image Source: seroundtable
Checkout the example shared by Glenn Gabe which signifies a big impact for a site.
Google's new CLS metrics are now live in Google Search Console. You might notice some improvements, like the screenshot below. Client has been working hard over the past few months & moved many "poor" to "needs improvement", & now to "good" https://t.co/Wn4RXrrIPA via @rustybrick pic.twitter.com/0enOEE5w1T
— Glenn Gabe (@glenngabe) June 2, 2021