The game of poker demands you to guess/estimate the possible outcome of an event, and then follows your decision to bet, call, or fold.  Winning in the game of poker is not a matter of chance, it involves calculations/probability.
In poker, you first place your bet.  The amount you bet depends on the limit of the game.  As the game proceeds, all the bets will be made into the pot that is in the middle of the table.  A round is won by the player that has a hand that is not folded when everyone else has folded, or the guy with the best combination.
Betting in poker is done systematically.  For instance, it can be done in a clockwise manner.  When it is your turn to bet, you have four options, bet, call, raise, or fold.  The four options can be further explained as follows:
Betting
Players bet an amount that is set by the type of poker game they are playing.  The amount that is bet goes into the pot, in the middle of the table.
Call
A call in poker means that you simply match the amount that has been bet by a player before/adjacent to you.  This means that if the player before you bet five dollars you will bet five dollars as well, which is put into the pot.  If another player then raises your bet, you will have to match what he asked for.  For instance, if you bet five dollars and a player raised your bet by betting eight dollars, you will owe three dollars.
Raise
In poker, when a player before you places their bet, you will be required to first match their bet, and then you raise the poker bet by an amount that you wish.  There are no guidelines or restrictions as to how much you can raise a player’s bet, it solely depends on you.  If you wish to raise in poker when the player before you bet five dollars, you will first have to place a bet of five dollars, and then, if you wish, you can raise the bet by three dollars, taking the total bet to eight dollars.
Fold
In poker, when a player folds, this means that this player has dropped out of the current hand.  Folding will mean that you have given up all the rights of winning the pot, however, you will not be required to place any bets in that same pot.
