In draw poker, you receive a full hand of five cards face down and can discard some to draw replacements for a chance to improve your odds. The player essentially gets 5 cards and then decides which ones to keep. Five-Card Draw is the classic example, and it is often the version people picture when they hear the word poker. It works well for small stakes home games and is a solid starting point if you want to understand hand building without community cards complicating things.
In stud poker, a mix of visible and hidden cards are dealt over several rounds. This completely changes how you bet since opponents can see part of your hand. Seven-Card Stud was the dominant format in American card rooms before Hold'em took over. No community cards, no discards. You work with what you are dealt, period.
In community card poker (Texas Hold'em, Omaha), each player receives private hole cards and shares a board of face-up community cards. This format dominates online poker rooms and tournaments globally. The shared board creates a fascinating dynamic: every player sees the same community cards but holds different hole cards, so reading opponents becomes just as important as reading the board.
In straight poker, the simplest historical form, each player is dealt a complete hand and bets in a single round. Played for small stakes in casual settings, straight poker is rarely seen in modern online lobbies but remains part of poker's DNA.
In high low poker, the final pot splits between the player with the highest ranking hand and the player with the lowest qualifying hand. High and low hands are evaluated separately, which means you might aim for both halves of the pot with a single hand. Alternatively, low poker awards the entire pot to the weakest conventional hand, flipping the usual hierarchy on its head.
You should also note that some casual variations like strip poker exist, but these are informal social games, not real-money formats found on any licensed platform.