A great video I found explaining the new data regulation rules in the EU and how they use and track your data from websites to give you advertisements and suggestions.

GDPR - General Data Protection Regulation

"GDPR sets new rules for how companies can treat user data.  Even if you don't live in Europe, companies are re-writing their rules for everyone, which is why you're seeing all those emails. The big difference is that the GDPR's idea of consent is a lot more intense than previous regulations, so companies have to ask for permission more often.

Probably the most important change is how companies share data behind the scenes. Right now, visiting a single website might feed data that dozens of different companies can use, but the GDPR means that any company that gets that data second-hand will have to explain why they need it and what they're doing with it. "