Internet site visitor tracking info, i.e. "cookies", helps to tune found things to your likings

 If you allow most or even all sites use their internet site visitor/customer behaviour tracking, it is called "cookies", on your browser, those can tune the internet search results, video recommendations, etc to correspond your likings. 

Lijewuse shops' advertisements can so be very nice. 

https://www.adjust.com/glossary/advertisement/