Legacy tracking approaches refer to older techniques used by marketers and website owners to track user activity across the web. These methods often rely on third-party cookies and client-side scripts, which have become less reliable due to increasing browser restrictions and privacy laws.

With the introduction of features like Apple’s ITP and Google’s Privacy Sandbox, legacy tracking approaches are no longer as effective or privacy-compliant. As a result, businesses are transitioning towards newer, more secure, and privacy-respecting technologies, such as server-side tagging. These updates aim to ensure that user data is collected ethically and in compliance with current privacy regulations.