The game of Poker has many views about its origin and there are a whole lot of variations in it. It's a very popular game and played almost all over the world in tournaments, saloons. The evolution of Poker is regular and nowadays Poker is regulated by gambling laws.
Poker is played with a standard deck of 52 cards.
The cards used in Poker are ranked in descending order starting from the highest; Ace, King, Queen, Jack, 10, 9, 8, 7, 6, 5, 4, 3, 2, Ace. There are four suits; spades, hearts, diamonds and clubs. All the suits have equal value in Poker.
The players are allowed to stand around the pot in which bets are made. The players are dealt five cards each and at the end of betting the player with highest card value, wins. Betting in Poker is usually done round the circle of the players till each player has made a bet or surrendered.
There are four options that every player has, when it has its turn.
1. Check: option of Poker that allows a bet of zero without losing interest in the pot.
2. Bet or raise: option which allows a nonzero bet which all the successive players must match or exceed; otherwise, losing interest in the pot.
3. Call: a nonzero bet equal to a preceding bet helps in maintaining the interest of a player in the pot.
4. Fold: it allows surrendering the interest and losing the game at another player's bet.
The ranking of Poker hands starting from the highest are as follows:
1. Straight Flush
2. Four of a Kind
3. Full House
4. Flush
5. Straight
6. Three of a Kind
7. Two pair, two cards of one rank:
8. One pair
9. High card
Ace in Poker normally plays high but can be played low also. The ranking of the players at the end of the game is explained below:
Straight Flush: it means a player has got five cards of the same suit in sequence, such as 76543 of hearts. The highest rank in this case will be AKQJT. It is also named as royal flush. The value of ace can play low to make 5432A, which is the lowest straight flush.

Four of a kind: four cards of the same rank accompanied by a "kicker", like 44442. the value of the cards is ranked as 44442>33332.
Full house: three cards of one rank accompanied by two of another, such as 666QQ. ranking is done on the basis of three same value cards so that 777JJ>666JJ.
Flush: it's an option of poker where five cards of the same suit, such as 96432 of spade. Ranking is done based on the series starting from highest card to the lowest card.
Straight: five cards in sequence, such as 76543. Here the ace may play either high or low, making AKQJT and 5432A.
Three of a kind: three cards of the same rank and two kickers of different ranks, such as QQQ84. the ranking is done on the basis of three same rank cards so that 77743>666Kk.
Two pair, two cards of one rank: two pairs of different rank and a kicker of a third rank, such as QQ443. Ranking is done on the basis of the top pair, then the bottom pair and finally the kicker, so that KK449 beats any of QQJJA, KK22Q, and KK445.
One pair: it has two cards of one rank accompanied by three kickers of different ranks, such as AAK53. Ranking is done by the pair, followed by each kicker in turn, so that AAK53 beats AAK52.
High card: any hand that does not qualify as one of the better hands above, such as QJ963 of mixed suits. Ranking is done for the top card, then the second card and so on for all five cards, as for flushes.
If there are no more raises or bets and all the cards have been dealt, then it marks the end of the round. Everyone opens his closed cards and the highest hand wins the pot.
And if there is a tie among the players, the pot is split equally among the winning hands.
Poker is an easy game and you can start playing it any time, even if you are very new to it. By getting the basic terms used in this game, you can go for it. There may different rules for different no deposit casino but the fundamentals are almost same. Once you are experienced, you can also make your decision on the basis of cards of other players.