The person dealing the cards deals to the left of the player with the dealer button first and rotates clockwise around the table giving each player one card at a time until each player has two cards. These are known as your hole cards.
A round of Texas Hold'em consists of a minimum of one and a maximum of four betting rounds. A hand ends when all players but one have folded or the fourth and final betting round completes with multiple players still in the hand - whichever comes first.
At that point players enter into the showdown (to be explained in the next section) and the player with the highest hand takes the pot. If two players share the highest hand the pot is split equally between them.
Texas Holdem Betting Rules - Pre-Flop
When all players receive their hole cards you're now in the pre-flop betting round. Each player looks at his or her cards and decides what action to take. In Hold'em only one player can act at a time.
The pre-flop betting round starts with the player to the left of the big blind. This player has three options:
Fold: Pay nothing to the pot and throw away their hand, waiting for the next deal to play again.
Call: Match the amount of the big blind.
Raise: Raise the bet by doubling the amount of the big blind. A player may raise more depending on the betting style being played. (More about No-Limit and Pot-Limit betting formats here.)
Once a player has made their action the player to the left of them gets their turn to act. Each player is given the same options: fold, call the bet of the player to their right (if the previous player raised, that is the amount you must call) or raise.
A raise is always the amount of one bet in addition to the amount of the previous bet, for example: if the big blind is 25¢, and the first player to act would like to raise, they put in a total of 50¢ (the big blind + one additional bet).
If the next player would like to re-raise they would put in a total of 75¢ (the previous bet + one additional bet). A Texas Holdem betting round ends when two conditions are met:
All players have had a chance to act.
All players who haven't folded have bet the same amount of money for the round.