There are 2 types of dances, the 'round' and more commonly known 'waggle tail' dance.
The round dance is performed by the scouts when the food source is within a couple of hundred metres of the hive. The bee runs one way in the circle, stops and then runs the other way. During the dance the scout passes a sample of the nectar to the other workers so they know the taste and smell of the source.
The waggle dance is for food sources greater than a couple of hundred metres. The scout waggles her body from side to side running in a semicircle restarting her dance where she began from. The angle on the honey comb relates to the direction from the hive and sun that the bees should fly.