The card counting technique I’m going to explain here is called Hi-Lo. Card counting also provides the ability to alter playing decisions based on the composition of remaining cards. Card counting allows players to bet more with less risk when the count gives an advantage as well as minimize losses during an unfavorable count.
That’s mostly because blackjack becomes more likely, and the player gets paid a 50% bonus on every blackjack and also a dealer holding (12-16) will bust every time if the next card drawn is a 10. When there are a lot of 10s and Aces left in the deck, and fewer low cards, the deck favors the player. This means you can keep track of the cards that have already been dealt, and then determine whether the cards remaining are more favorable to you or to the casino.
Depending on the remaining cards, the advantage can swing to the player. Blackjack is beatable if cards aren't shuffled every hand.
