Visitors are the number of visitors who clicked on the element? What does a visitor represent for a click?
This is the number of visitors who clicked on the item in question. A visitor may have clicked on the element several times, he will only be counted once during the period.
Clicks are the number of clicks on the element that leads to the page for all visitors, even if they have clicked several times? Are they cumulative clicks?
These clicks are indeed cumulated. This is the total number of clicks for the analyzed element, all visits and visitors combined. If a visitor clicks on the element several times, all clicks will be taken into account and accumulated.
How is the percentage of clicks calculated?
The % clicks metric corresponds to the following ratio: clicks on the analyzed element / total number of clicks on the site.
Does the number of clicks/number of visitors correspond to the total number of clicks on the element divided by the number of visitors who clicked on the element?
Exactly. This is, again, a ratio that expresses on average the number of times a visitor has clicked on the element during their visits.