Beginner - Doesn't know the rules well and wants to take a lesson to learn. Or has played a handful of games and wants to play in a fun non-competitive tournament
Intermediate - DUPR 2.0 to 3.5. Plays regularly and wants to play in a competitive tournament against experienced players.
Advanced - DUPR 3.5 or above. Plays multiple games per week. Players without a DUPR rating are probably Intermediate.