You're dealt two private cards. Five community cards are dealt face-up in three stages — the flop (3), turn (1), and river (1). Make the best 5-card hand from any combination of your cards and the board.
Betting happens before the flop and after each stage. You can fold (give up the hand), check/call (match the current bet), or raise (increase it). Best hand still in at showdown wins the pot.
Your bankroll carries over between sessions. If the table's AI runs low, they rebuy automatically — only you can bust out.