I ran a 5-day experiment to see how fast Google reshapes your ad profile

6 hours ago

Google builds algorithmic profiles based on user browsing habits, which influence ads and recommendations.
A 5-day experiment with three Google accounts showed profiles can be reshaped quickly with deliberate browsing.
Two active accounts (Fisherman and Fitness Guy) saw significant changes in interests, while the control account remained unchanged.
Google's ad profile is dynamic, adding and removing interests based on recent activity, not just accumulating them.
YouTube recommendations also shifted dramatically for active accounts, aligning with their browsing personas.
The control account's profile stayed static, proving changes in active accounts were due to browsing behavior.
Google's profiling is responsive; even one session can add multiple interests to a profile.
The experiment highlights the malleability of algorithmic identities and the potential to reshape them deliberately.
A tool called MirrorMask is being developed to help users control their algorithmic profiles by simulating different browsing personas.

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