This site uses Google Analytics as pretty much all websites do these days. It records your IP and other device info so it can track and make meaningful reporting. I use it just to look at the nice real time map and see if anyone is actually reading this blog.
Yes this site will store Cookies on your PC, it can all be blocked if you wish your end, but things will probably stop working. I promise no annoying pop ups that stop you reading what you came here for.
If you subscribe then your data will be stored on this platform in order to send out posts that you want to see.
At anytime you can opt out and be done with it.