This doesn’t disable in-app ads, or reduce the number of ads you’ll see. Instead, it disables access to a tracking feature that normally allows ad networks to track your usage across apps. This is used to build up a personalized ad profile about you and serve targeted ads.
With this feature disabled, you won’t see ads specifically targeted to you based on other apps you were using. For example, if you’re shopping for a product in App A, you won’t see ads for that type of product in App B. You will see ads for that type of product in App A, however — this just prevents cross-app ad-tracking. Use the below addresses: