Nobody knows this about Google.
Go to Google Search Console, performance search results.
Click more.
Click compare.
Compare last 28 days to previous period.
Click pages now.
Sort for negative clicks difference.
Look for pages that lost clicks but still have strong impressions.
This could mean a competitor improved their page or Google wants something slightly different.
Click on one of the pages, turn on average position.
Sort again for negative clicks difference.
Look for keywords where you lost a lot of clicks, where you also lost ranking positions.
A negative ranking position like this.
Now you'll see keywords where you lost clicks from Google over the last 28 days where you also lost rankings.
You're showing up lower on Google for these searches, so you're getting less clicks.
Update your page to better match these searches.
If it's relevant to your content, that could mean fresher information, more detail, presenting something more clearly, or even just using the keyword exactly in your content.
And learn my method of purchase intent search engine optimization at compactkeywords com.