The game of poker is really strategic and as in all games of strategy in this game you will find that there are some weak player and some strong players. The strong players devour the weak players and take their money off them. In poker, a weak or bad player is known as a fish, while a strong or good player is known as a shark.
According to the law of nature, the stronger shark kills the weaker fish. In the same way in poker, the bad players become the prey of good player. If you want to survive as a poker player you must win the game; unless you win game the chance of your survival becomes less, especially in a tournament game where you need to collect chips.
The winning in this game is dependant upon strategy and luck; if you follow right strategy then you can win the game. Further there is no such absolute right strategy to win every game; each time you play you are playing against new players, also different games may require different strategies, the poker shark is always familiar with the rules of the game and knows all the tips and strategies such as table positioning, the shark uses these to his advantage meanwhile the fish has never even heard of table...