Clicks on ads that Google considers to be illegitimate, such as unintentional clicks or clicks resulting from malicious software.

• Here are just a few examples of what Google may consider to be invalid clicks:

  Identify and fix invalid click issues
  Issues with clicks and clickthrough rate

  • manual clicks intended to increase your advertising costs or to increase profits for website owners hosting your ads
  • clicks by automated clicking tools, robots, or other deceptive software
  • extraneous clicks that provide no value to the advertiser, such as the second click of a double-click
  • Each click on an ad is examined by our system, and Google has sophisticated systems to identify invalid clicks and impressions and remove them from your account data.
  • When Google determines that clicks are invalid, we try to automatically filter them from your reports and payments so that you're not charged for those clicks. If we find that invalid clicks have escaped automatic detection, you may be eligible to receive a credit for those clicks. These credits are called "invalid activity" adjustments.

* Nguồn: Google