[alexaholic]

Facebook maintains a list of topics it thinks you are interested in and shows you ads based on that. You can see and manage it in the Ad Preferences section. See https://m.facebook.com/help/247395082112892

Google too has My Activity https://myactivity.google.com/ where you can manage your… activity on Google properties e.g. you can disable search history.

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FWIW I have Google history turned off, though I use DuckDuckGo 99% of the time.

Also I’ve reset my Facebook preferences once a couple of years ago. It was a very long process as there was no one button to clear them all… Anyway, I was hoping it would reset my Facebook experience entirely, but I wouldn’t say it did. I revisited the section some time later and found Facebook had built another list. A lot of seemingly random topics, but I suspect they’re weighted. I’m no longer logged in in any of my browsers, only the Facebook mobile app. Also I occasionally report ads for random reasons.