Poker is a card game where players place bets in a pot at the end of each hand. It is a gambling game that requires a little bit of luck and quite a lot of psychology and math. During each betting interval (or round), the player to the left of the dealer makes a bet by placing chips into the pot. Players can then call the bet, raise it or drop out of the hand entirely (fold).
The player who has the highest poker hand at the end of a betting interval wins the pot. The cards are dealt from a standard pack of 52, plus one or more jokers (depending on the specific game). Cards are ranked high to low, Ace, King, Queen, Jack and 10, 9, 8, 7, 6, 5 and 4; there are four suits (spades, hearts, diamonds and clubs).
A large part of poker is observing your opponents. This is often called reading them and a big part of that comes from paying attention to their betting patterns. Players who bet a lot are usually playing strong hands, while players who fold frequently might be holding weak ones. This knowledge allows you to make smart decisions at the table. It is also important to always be aware of your position in relation to the other players, their hands and your own cards. This will prevent you from making a mistake in the heat of the moment.