ClickGuard logs the IP address of every ad click through your Google Ads tracking template, and of organic visits through the website tracking code. It checks each IP against billions of data points, like known proxies, data centers and blacklists, to judge its risk and decide which sources to block with IP exclusions.
ClickGuard logs the IP addresses of devices making ad clicks by tracking clicks via the Google Ads tracking template. IP addresses of devices that generate organic traffic on your website are also logged via the website tracking code.
Logging and processing IP addresses, running them against several billion different nodes of information available about specific IP addresses, IP ranges, and their past behavior is crucial to combating click fraud and reducing wasteful ad traffic.
ClickGuard is able to protect Google Ads campaigns from click fraud and optimize them against unwanted and low-performing sources by preventing IP addresses from seeing ads by leveraging IP exclusions in Google Ads.
See also: How does ClickGuard check IP addresses.