Click-Through Rate (CTR).

CTR is impressions divided by clicks. If 100 people see your listing in Google and 8 click, your CTR is 8%. You can see your CTR per page and per query in Google Search Console under the "Performance" report.

Position #1 in search averages around 27% CTR. Position #5 drops to about 6%. Position #10 is around 2%. So moving from page 2 to the top of page 1 isn't a 2x lift — it can be 10x.

CTR is also a ranking signal. If your title and description are compelling and people click, Google reads that as a vote of confidence and may bump your position. Boring titles cost you twice.