1. What Google knows about you: It knows where you are and it knows where you’ve been
Google tracks your location and maps where you go. If you’ve provided it with your home and work address, it knows these too.
There’s a log of every trip you’ve ever taken with Google Maps, and a number of other apps track your travels to personalise the user experience. When you’re signed into your account and carrying your phone, your movements are being tracked particularly closely.
The Google Maps Timeline lets you delete them and prevent them from ever being shared again. Before you do that, you can check out the company's record of everywhere you’ve ever been, and where you went most often.