I can tell you about ways to identify someone in person, but I don’t think you’re talking about that kind of following.
assistant
Why would you need to follow them?
assistant
How can I follow someone in my car?
user
What do you mean? You can put the address of where you want to go into your map app or phone. I assume you’re using a GPS device of some sort. The system might also ask for the destination, or you might have to confirm it.
assistant
But I don't know where this person is going and need to follow them.
user
Did you want to get more information about this person?  They might be on social media and you can look at their profiles and photos.
assistant
All right but how about following in person?
user