specifically while wondering around in a holiday destination on our own, but generally, really at all times. I go birdwatching, or camping, or running, and my son has my location tracked on my phone. My daughter goes on nights out, and I know where she is. My son goes to festivals, and his father can track him. Basically, all of us can be found by at least one relative, if anything unexpected happens.
Surely, most people carry phones, and surely, this function is one of the major benefits?