Pokemon GO has a small little update with improved tracking. There are now 2 types of tracking, and you can either have one, the other one, or both.
The first tracking feature is called Sightings. It actually doesn't track anything; it just shows you nearby pokemon in front of a small picture of grass.
The second is called... nearby. You can individually track pokemon and the game will tell you where it's located, what pokestop to go to to get the pokemon, and tells you when the pokemon flees. I don't have it.
Also something is apparently a small little feature where if you're going too fast, the game will have a GUI pop up with text implying that you're in a car.
Thanks to shoddy GPS tracking, even sitting in a chair in my house, Pokemon GO thinks I'm in my neighbor's house, on the road, or in my other neighbor's house. Because of this, the game now loves telling me that I'm going too fast and now will ask me if I'm in a car.