Helpers may wish to set up their own Geo-fences for Subjects and get customised notifications when Subjects enter or leave that location. 

For instance, Emily is a teenager and has failed to set up her own geo-fences, or she is going to an unfamiliar location. 

Rather than Emily’s mother relying on her daughter to tag that location when she arrives, her mother can set up a geo-fence for that location in advance and get notified when Emily arrives. This is completely independent of Emily and Emily will not know about her mother’s custom geo-fences for her.