Poker is a game where you bet that your cards are better than those of your opponents. If you have the best hand, you win. If you get your opponent scared and surrender a weaker hand, you also win (either through bluffing or just tenacity). There is no magic formula for winning in poker, just a series of meta-skills that can be learnt by hard work and good coaching.
The most important one is the ability to make the right decision in the context of a particular situation. Then you maximise the value of your wins and minimise the losses from losing hands. The result is that 99 times out of 100 you will make money. The other 1% is what separates poker from other games like chess or baseball, where it is impossible to eliminate the unknown or the uncontrollable.
There are many reasons to play poker. Some people do it to be competitive, others to earn a living and some just do it for fun. The game is very easy to learn, but the road to mastery takes a lot of discipline and effort.
This article talks about a GTO based poker strategy that, if followed, should make you unbeatable by your opponents. However, it is important to remember that poker is still a game of chance and even if you follow this strategy there will be hands where your opponent gets lucky. But that is what makes the game so exciting and fun.