Places is a facebook feature that allows you to see where your friends are

WHAT IS IT?
PLACES IS A FACEBOOK FEATURE THAT ALLOWS YOU TO SEE WHERE YOUR FRIENDS ARE AND SHARE YOUR LOCATION IN THE REAL WORLD.

WHAT DOES IT DO?
FACEBOOK PLACES USES GPS SO PEOPLE CAN "CHECK IN" ON THEIR MOBILE PHONES, LETTING FRIENDS KNOW WHERE THEY ARE AND WHAT THEY'RE UP TO.

WHAT ABOUT MY PRIVACY?
SOME IMPORTANT FACTS ABOUT THAT:
IF YOU DON'T CHOOSE TO CHECK IN, YOUR LOCATION ISN'T REVEALED. IT SEEMS BASIC, BUT THERE APPEARS TO BE A LOT OF CONFUSION ABOUT THIS.
THE DEFAULT SETTING FOR FACEBOOK PLACES ONLY SENDS LOCATION ALERTS TO YOUR FACEBOOK FRIENDS.
WHEN YOU'RE WITH A GROUP, FACEBOOK FRIENDS CAN CHECK YOU IN ALONG WITH THEMSELVES TO LET PEOPLE KNOW WHAT KIND OF GROUP IS HANGING OUT.