Choosing an accurate rider ability level will match you with the appropriate bindings for the rider. It's important to be honest with yourself.
A beginner is a first time rider or still new to the sport and is still learning how to carve.
An intermediate rider may be still fairly new to the sport, but is able to carve, is in control of themselves and beginning to explore slightly more challenging terrain.
An advanced intermediate rider is someone with a bit more experience who is comfortable on most runs, but still cautious and riding at moderate speeds.
An advanced rider is someone who is not only comfortable on the majority of runs and terrain, but is more aggressive and tends to ride at higher speeds.
An expert rider prefers to ride aggressively and is comfortable on any terrain or at any speed.