Whitewater refers to moving water caused by a gradient, where the water has waves that break and form a white foam. Whitewater kayaking, therefore, includes waves, drops, eddy lines, waterfalls, making for an exciting paddling environment, but does need to be managed with care as there are more potential hazards than on flat water. Having said that, whitewater comes in grades from 1 to 6, and you would need to identify the difficulty level you are most comfortable with, given your skills and paddling ambitions. Training helps you to progress safely and quickly, thereby reducing the frustration of a steep learning curve.