even if I have all background data turned off?It's normal. You don't have to visit the sites. All apps that use Safari's engine will store data in the background.
Thank uI could be wrong here (and someone please correct me if I am) but, what you posted looks like advertising and ad tracking analytics. Google is tracking everywhere you go (for one problem)
I suggest you get an app called “lockdown.” It is free and will block ad trackers etc.