This question already has an answer here:
It was a slow day so I just started flicking through my timeline on Google maps to see where I have been ever since I created my Google account. I only have the account on my phone but sometimes sign in on my laptop, these are the only two devices that use my account and I am the only one to have ever accessed my account.
However, when looking at my map I realized that Google said I had been somewhere that I honestly have never been before. It's more than 145 miles away from where I live and I've never been anywhere near this place in all my life. On top of that it also said that I took 16 hours to cross the street in the industrial estate that it placed me in.
I looked in my diary and I'm 100% confident that I wouldn't have left the street where I lived that day. What I don't understand is how this happened?