NanKate, a Fitbit is simply a device for measuring how many steps you take. Initially people tend to use 10,000 steps as a target but this is a purely arbitrary amount and can be de motivating as you have to walk a very long way to clock up 10,000 steps.
A much better idea is to walk as far as you are comfortable with then gradually increase this on a daily basis. So perhaps the first day you reach 5,000 steps. Anything over 5,000 the next day is a cause to celebrate, whether it is 6,000 or 5,010. You should gradually get fitter and feel good about your achievements.
My OH turned our 10,000 daily steps into a chore which is how I hit on this more motivational technique. Try it.
Anyone else out there been turned off of exercise by unrealistic targets?