For many SEO professionals, website traffic is one of the main metrics for assessing a site’s quality.
They are willing to pay more for greater site traffic.
However, inflating traffic is very easy.
SEO tools buy clickstream data from internet providers.
Therefore, you can purchase cheap traffic for a link like this: google(.com)/search?q=keyword1
And after some time, you might see a high frequency like in the 1st screenshot.
The main victims of the Google update were link farm sites.
One of the link selling platforms.
There were 40K+ sites selling links, now there are half as many (2nd screenshot).