Estimate of the traffic generated by the keyword, the group or the site. Internal indicator of the tool based on the search volume and click rate of the result in question.
Calculation: Click rate of my site's position on the keyword * Search volume
My site is 1st on the "assurance" keyword which has a search volume of 10000 (10000 users type this keyword each month).
The click rate of the 3rd position is 11%.
So, the traffic estimate is 10,000 * 11 / 100 = 1,100 visits per month