Browser fingerprinting is a common tracking technique that creates a unique "snapshot" of your device based on its configuration. Unlike cookies, which are stored as files on your computer, fingerprinting collects information that your browser naturally makes available to websites, including your screen resolution, installed fonts, operating system, and even how your hardware renders graphics.

By combining these characteristics, fingerprinting can create a highly distinctive digital ID that may be used to recognise your device across different websites, even if you use a VPN or clear your browsing history. While it can be used for legitimate purposes such as fraud prevention and security, it can also enable persistent tracking and targeted advertising without meaningful user consent.