Poker is a card game played between two or more players. It is a game of chance, but it is also a game of skill and knowledge. It is the skills that win players money in the long run, not luck.
If you play poker regularly you will eventually get to know what hands to play and which ones not to. You will learn to read tells (eye movements, idiosyncrasies, betting behavior etc). When someone calls your bet and you have a high pair or better it means that they are probably playing a hand that doesn’t have the best odds of winning.
The first player to act places chips into the pot (representing money, for which poker is almost always played). Then each player in turn may either call the amount that was raised or raise the amount that they themselves are placing into the pot. When the betting is complete, the player with the highest ranked hand wins the pot.
Beginners should start at the lowest stakes possible to allow them to learn the game without donating money to the more skilled players at the table. This allows them to practice against weak players and improve their poker strategy. Once a player has enough experience and confidence they can move up to higher stakes and play versus the more skilled players, making more money in the long run. However, even at the lower limits it is still possible to improve quickly.