When you rest your iPhone, does it stop sharing your location?

If you have your location shared with people indefinitely, and you reset your iPhone will your location stop sharing with them/ will they be notified? (When someone stops sharing location manually it says "so-and-so stopped sharing location with you")
Or is the only way to stop sharing your location with someone to go into the convo, and go to details and click "stop sharing location"?

Depends on the default setting concerning that. Not sure what it is off hand (likely for it not to share location). You wouldn't have to reset your phone just to turn that off.