Poker is a card game played between two or more players. Each player has chips (representing money) and a set of cards. The object is to make the best five-card hand, using a combination of your own two personal cards and the five community cards on the table. If you bet and all of your opponents fold, you win the pot (all of the chips that have been bet so far).
A good starting point is to read some books on poker theory and strategy. You can also study the plays of experienced players to learn from their mistakes and pick up some of their successful strategies.
In general, the first player to the left of the dealer has the right to open betting. If he does not, then any other player may open the betting. Then, in turn, each player must either bet or check. If a player has a strong hand, he should raise his bet in order to force weaker hands out of the pot.
There are a number of different ways to calculate the frequency of certain types of hands, but it is important to keep in mind that these calculations can be very difficult. This is especially true for higher-ranked hands such as the straight flush or four of a kind. The reason is that these hands can be made in a very large number of combinations. Therefore, it is necessary to take into account other factors such as the number of opponents in a pot when making these calculations.