Suppose Mr.X visits a blog post on my website, views an advertisement by Google Adsense, gets what he came for and leaves the site. After some time, for some reason, he again visits the same blog post on my site and sees the same advertisement.
Will the return visit of Mr.X be counted as 2 impressions by Google Adsense or 1 impression? And is there any time span (or something) after which it will be counted as 2 impressions?
I searched Google, but did not manage to find a specific answer.
Found a QA at this link: Does page impression get counted for unique visits? but neither did I understand the question nor do I think it addresses my problem.