Google Analytics: Our dear friends at Google give me data about a whole myriad of things: how many people visited my site, whether they were repeat or unique visitors, the source of these visitors, how much time they spent on each page, the language of their computers/browsers, their locations, the operating systems and browsers they're using, whether they are on mobile or desktop, demographic data, and much, much more.
Honestly, I only look at how many people visited my website over a given time period. I don't care about or use any of the other stuff. I just don't have the time or interest to do so.
Newsletter: If you sign up to my newsletter (which you should right here!) I obviously get your email address. What do I do with this? Send you newsletters with updates about the latest blog posts. That's it.
I absolutely do not sell any of your data to third-parties for advertisements or anything like that. However, if you share my posts on social media, then those parties might be tracking you. I have no control over what they do with this process, though.”