A Fitbit is a pedometer. It measures how many steps I take a day. It actually measures how many very active minutes I have as well. I want to get up to 10,000 steps a day, but I have to work up to that, especially since I have been very sedentary for the last couple of years. My average steps have been about 1000 or so. Not great. So my goal for the next two weeks is to log in about 7500 steps a day. The Fitbit is so cool that it will actually light up and vibrate when I reach that goal. Wish me luck!!!