OnePlus
Turn Off Personalized Ads auf OnePlus
OnePlus assigns every device an advertising ID. Apps and ad networks use it to link your browsing history, app activity, and search behavior to build an interest profile.
That profile decides which banners or pop-ups you see. Disabling personalization does not block ads or reduce their number. It only stops OnePlus from matching them to your recent activity, so ads become more generic.
Where to find the setting
Open Settings ➔ Privacy ➔ Advanced ➔ Ads, then toggle Opt out of Ads Personalization and confirm with OK.
The toggle is per device, not per app. If you reset your device or switch accounts, check the setting again since it can revert to its default state.
If your goal is fewer ads overall rather than less relevant ones, this setting will not help. Ad blockers or app-level privacy controls target ad volume, while this toggle only affects targeting.

