Marketing guy with Google Analytics certification here.
The tool is used to collect data about user activity on the website (how many people online, where they’re from, what they’re looking at) and produce reports. Analytics tracking services are used by virtually all websites to monitor performance and help understand what visitors like and don’t like. All collected data is anonymous or meta, it’s not tracking individuals but rather the website content. It won’t say what pages you’ve looked at on this website, but it can say what pages people from your geographical area are generally looking at.