Within poker there are a few different variations that make the games slightly different. Here is a break down of those changes:
Straight Poker: This is the oldest form of poker and involves each player having a complete hand dealt to them. Each player bets in round one and raising and re-raising is allowed. This is the most straightforward of poker games to follow; different variations come from this structure.
Stud Poker: Cards are dealt in a slightly different manner as some are dealt upwards and some downwards and each player bets in turn. This is the first variation to appear from the Straight poke gamer, the most popular stud game 7 Card Stud where 2 extra cards are dealt to each player, 3 facing down and 4 facing up, and of these cards the player can choose the best possible 5 card hand.
Draw Poker: 5 card draw is the most famous of this variation. The hand is dealt to each player, all cards face down, the players then bet and after betting the players can then change their cards by getting rid of unwanted cards and being given new cards.
Community Poker: This is a variation of Stud. Each player is dealt an incomplete hand, face down, and then a bunch of community cards are dealt in the middle of the table face up which the players can use to make up their 5 card hand. Texas holdem is a famous version of a Community poker game.
Miscellaneous Poker: Some variations use the above as a structure and then incorporate other rules such as about individual cards for example 3's and 9's are wild and if any player who stays in (or the deck hand) has a 4, they get an extra card.