A visibility score is a performance metric that shows you the percentage of clicks that a website receives through organic search results. We calculate it by dividing your website traffic by the total number your website appeared for a single keyword search. The higher the rank is, the more influence it has on the visibility score.
You occupy all the top 10 positions of Google for a single keyword, it means your visibility is 100%. If you are on the top position but your competitors take the other ranking spots, your visibility score is around 30%. Visibility scores show which keywords are bringing your website organic traffic and what adjustments are needed to be done.