How Google Detects Invalid Clicks

We often hear that Google has a mysterious mechanism to detect invalid clicks, used to combat cheaters, but how exactly does Google accomplish this? This article summarizes the methods Google uses to determine whether an ad click is valid. Generally speaking, Google doesn't immediately suspend your account; instead, they flag your account for special monitoring, and sometimes even send warning letters.

1. IP Address

No one can deny how straightforward this method is. If the person clicking on the ad has the same IP address as the person logging into your AdSense account, your account will be monitored.