there are 3 levels of accuracy on your device, make sure its on high accuracy and you have google play services enabled.
what it is ...
Google's fancy scarier than the NSA ability to know where most router mac's live on the globe
as you move room to room down the block , drive around it pings routers and other id's for location and more than triangulates
long story short you in turn give google the power to sniff and locate new tags and it makes life better for everyone..
high accuracy doesn't really drain all that much more on the N5,.... anyway give thanks if its deserved my old ass account seems fake to XDA all of this sudden,.,