Family Locator What Does "Family Locator" On A Cell Phone Mean, And Do You Have To Use It?

What does "Family Locator" on a cell phone mean, and do you have to use it? - family locator

Are you looking to buy a cell phone, and I would say it has a locator family, but I do not want my family on my phone to see where I am. What does that mean?
Help'm so confused