Poker players mainly use poker mathematics to decide if it is worth betting and chasing a card to make a winning hand. There are two elements that help them make this decision: The number of Outs they have ( the number of cards that can make a winning hand) and what is the probability that an Out will be dealt.
Like in the games of chess, Go (game), and many other games, artificial intelligence systems beat even the best humans at poker. Poker is a game of imperfect information (because some cards in play are concealed) thus making it harder for anyone (including a computer) to deduce the final outcome of the hand.