The object of Texas Holdem is to make the best 5 card poker hand from the 5 community cards on the table and your own 2 cards that only you can see. The community cards are dealt out during the hand with betting rounds in between so you are betting on the likleyhood of forming a winning hand by the end of the hand when all cards are revealed.
The highest possible poker hand is the Royal Flush. It consists of a Ten, Jack, Queen, King and Ace, all of the same suit.
A combination of both a straight and a flush. The cards must all be of the same suit and they must run in value (e.g. 4,5,6,7,8). If more than one player has a Straight Flush, the player with the best Highcard wins.
This hand is made up with 4 cards of the same value (e.g. 4 X Jacks). If more than one player has Four Of A Kind the highest value Four Of A Kind would win.
This hand is made up with 3 cards of one value and two of another value (e.g. 3 X Nines and 2 X Queens). If more than one player has a Full House the winning hand would be the one with the highest triple value or failing that the highest double value.
A Flush is when the hand contains 5 cards of the same suit (e.g. 5 X Spades). If more than one player has a Flush the winner is the player with the best Highcard.
To make a Straight the must run in value (e.g. 4,5,6,7,8) but it does not matter what suit they are. If more than one player has a Straight , the player with the best Highcard wins.
This hand is made up with 3 cards of the same value (e.g. 3 X Sevens). If more than one player has a Three Of A Kind the winning hand would be the one with the highest value Three Of A Kind.
Two pair of the same value (e.g. 2 X Fours and 2 X Sevens). If more than one player has Two Pair, the winner is the player with the highest pair value. If both players have the same pairs the player with the best Highcard wins.
One pair of the same value (e.g. 2 X Fours). If more than one player has One Pair, the winner is the player with the highest pair value. If both players have the same pair the player with the best Highcard win.
The Highcard is the highest value card that is in your hand that is not duplicated (not a pair, 3 of a kind or 4 of a kind). If one or more players has the same Highcard the next highest Highcard will be evaluated until a winner is found.