https://www.businessinsider.com/how-to-turn-off-iphone-list-of-your-locations-2019-3

Iphone- Researchers say that apple keeps in.touch with your destination wherever you may go. Like for example it tracks your time wherever you go like when you go to school in the morning and leave at 8 you will get a notification 10 minutes before you leave saying that this route you will reach your destination in 18 minutes with slight traffic. There is a history in the phone that keeps track of all of the places you have gone and how often you go there. Also while capturing pictures it will usually capture the location you have taken them. Apple has this setting because “to learn places that are significant to you”.