Since cookies can sometimes be deleted from a visitor’s machine, they are not always the most reliable method for long-term tracking. However, ClickGUARD uses a proprietary tracking mechanism that maximizes accuracy and performance by combining cookies with advanced detection techniques.

ClickGUARD generates an anonymized, unique device ID for every visitor's browser, which is stored using cookies. This device ID enables ClickGUARD to track visitor activity across multiple ad clicks, campaigns, keywords, and more.

By using cookies to maintain a reference to the tracking profile (device ID), ClickGUARD can detect repetitive or suspicious ad clicks originating from the same browser or device, enhancing protection against click fraud.