List of poker variants - Wikipedia.
Official poker rankings: ties and kickers. Poker is all about making the best five-card poker hand from the seven cards available (five community cards plus your own two hole cards). That means in the event of a tie with four of a kind, three of a kind, two pair, one pair, or high card, a side card, or 'kicker', comes into play to decide who wins the pot.
Full House - This colorful hand is made up of three cards of one rank and two cards of another rank, such as three 8s and two 4s. Flush - Five cards all of the same suit, but not all in sequence, is a flush. An example is Q, 10, 7, 6, and 2 of clubs. Straight - Five cards in sequence, but not all of the same suit is a straight. An example is 9.
So, even though 7 Card Stud features 7 cards dealt to each player by the river, only 5 cards on a player's individual board can be used to make the best 5-card hand. Also, 7 Card Stud is normally played in a fixed-limit format where the smaller bet is wagered for the first two betting rounds, and the larger bet is wagered for the last three betting rounds (on the fifth, sixth, and seventh cards).
The player that can make the best five card poker hand out of their seven cards will be awarded the pot at the showdown. Depending on where you are playing, the dealer may announce several things. Dealers are supposed to announce the low card, the high hand, player’s up-card pairs, and other made hands. Dealers are not required to announce possible straights or flushes, but some of them do.
In most high-low games the usual rank of poker hands is observed, so that an unsuited broken straight (7-5-4-3-2) wins low (see Morehead, Official Rules of Card Games). In a variant, based on Lowball, where only the low hand wins, a straight or a flush does not matter for a low hand. So the best low hand is 5-4-3-2-A, suited or not.
Exposed cards are dealt with on a situational basis, as stated in the rules of the specific variation of poker. When a card is exposed by the fault of the dealer, the rules of the game apply, and the player does not get a say in keeping or rejecting the card. Any card shown to one or more other players by the dealer is considered an exposed card, as is any card that is dealt off the table.
More often cards such as jokers and deuces are popularly used as wild cards in poker. As per rules of wild card poker, the highest hand in a game with wild cards is 5 Aces. Five of a Kind can defeat a straight flush. Always remember that wild cards do not hold rank and value in a straight flush and in case of two players with the same winning straight flush, the pot will be split regardless.