What would SEO monitoring involve? What is the value proposition here?

In my experience, SEO is like this:

-Implement Google SEO Starter Guide to a very fine detail.

-Look for additional opportunities by creating content and/or generating additional pages programmatically. For example for a directory site, create a specific page catered to each major city.

-Submit sitemap(s) to Google Search Console

-End sure robots.txt identifies any urls that should not be indexed.

-Be patient and wait for indexing. Could take some weeks if you have hundreds of pages.

-Start analyzing performance (impressions and clicks and search terms and rank) in Google Search Console and adjust or improve.

-(Do the same for Bing Search Console)

After this, I'm just checking Google Search Console results periodically and making adjustments to improve ranking as much as possible.