Google maps sent me an alert and I don't know why

[AC Question]

I've been using Google maps for years, and had this Samsung galaxy s4 for about 2 years. I looked up an address along my bike route and then a week or so later Google maps sent me an alert saying it would take x amount of time to get there. I had not scheduled the alert, so I kinda assumed the person had downloaded my photo from Facebook or something.