Choosing an accurate ability level will match you with the appropriate equipment.
A beginner is a first time skier or someone very new to skiing that will be cautious and is still learning basic control.
An intermediate skier has a little more experience learning the basics of controlling their skis. Intermediate skiers are still cautious on more challenging runs and are comfortable at moderate speeds. Athletic beginners will also benefit from skis designed for intermediate skiers.
An advanced intermediate skier is a more seasoned skier that has good basic technique and is either starting to explore off trail terrain, freestyle terrain, or wants to develop strong carving and technical skills. An advanced intermediate is comfortable skiing at moderate speeds on intermediate trails in most snow conditions or at moderate speeds on advanced trails in optimal snow conditions.
An advanced skier is capable of maintaining solid technique on advanced terrain in most snow conditions. These skiers are able to ski in control at higher speeds, but don't always ski aggressively.
An expert skier is capable of skiing safely at high speeds on any terrain regardless of snow conditions. Expert skiers have strong technique and prefer to ski aggressively.