Browser restrictions have a profound impact on online tracking, primarily by enhancing user privacy and disrupting traditional cross-site tracking methods. These measures, such as blocking third-party cookies and implementing Intelligent Tracking Prevention (ITP) or Enhanced Tracking Protection (ETP), severely limit the ability of advertisers and analytics companies to follow users across different websites. Consequently, businesses face significant challenges in areas like accurate ad attribution, understanding full user journeys, and building comprehensive user profiles. This shift has necessitated a move towards first-party data strategies and more privacy-preserving tracking alternatives, fundamentally altering the digital advertising landscape. While beneficial for individual privacy, it often results in a more fragmented view of the user for marketers, complicating personalized experiences and performance measurement. More details: https://x.com/MarieW84005