Search engine optimization is a term to describe what people do to help a website rank on search engines like Google.
Let’s see few important measurements you must watch for SEO.

1. Organic Traffic
   Organic traffic is one of the primary results of optimizing your website for search engines. The higher your organic traffic, the better your website is performing in Google’s rankings.
   The most accurate and reliable tool is Google Analytics.
2. Bounce Rate
   Tracked in Google Analytics, Bounce rate is the percentage of visitors to a particular website who navigate away from the site after viewing only one page.
3. SEO Score
   This is something you won’t find in Google Analytics, but there are plenty of online tools.
   SEO score is a rating/score that displays how well-optimized your site is from the search engine perspective.
4. Domain Authority
   This number shows how reliable/authoritative your site looks to search engines. There are online tools for that.
5. CTR (click-through rate)
   It’s calculated based on the users that clicked on your search result, compared to the number of people who saw it. You find it in Google Analytics.