SEO Visibility is the percentage of all clicks for a given keyword you are getting.
100% SEO visibility is the absolute best edge case that basically never happens. Read: you’re getting 100% of the available clicks.
35% SEO visibility is when you rank #1 for your keyword. Here, 35% represents the amount of clicks that you can generally expect to get when ranking #1 for a search term.
To that tune, if you rank, say, #10, your SEO visibility is at 2%. From there, it goes like you’d expect.
Lastly, ranking outside of the first page gives you 0% SEO visibility. After all, page two of Google is the best place to hide a dead body.
SEO Visibility is the percentage of all clicks for a given keyword you are getting.
An interesting article on SEO Visibility, how to check for it and what to do if you start to lose visibility for a keyword: https://ahrefs.com/blog/loss-of-seo-visibility/