Delete customization data

[Maddisonn]

I shut customization services down but I'm still seeing ads for websites I visited weeks ago. How do I delete everything? 

[arianwen27]

Customisation data isn't the source of your ad problem. You'll probably need to delete your ad ID in google settings and disable personalised advertising in your google account

Websites can't access customisation service, that only gives ad into to a few samsung apps

[keith30]

You need to look at your Google settings also any social media sites like Facebook, IG and any other sites that have marketplace features because alot of it is down to the settings in Meta check all.