Card counting is a skill which is used by players of card games to realize an advantage by following cards which have been played. This gives the player an idea of the value of cards, which have to be dealt with. Counting cards is a skill that has more use in black jack than in any other card game.

In twenty-one, a player has an advantage when the remaining deck contains "big value cards." High cards could be tens or aces. The counter in the casino takes advantage of such situations by making bigger wagers, as and when they occur. A good many skillful gamblers use the makeup of the shoe to adjust their overall plan. Inexperienced players on occasion have difficulty while performing quick card counting and might be prone to errors, when it comes to handling dealt decks of cards. Blackjack card counting is an industry on its own. massive amounts of money are made or lost, both by the players and the gambling dens, based on card counting methods in use.

Computing has made its presence known on counting cards too, with improved computing power affecting the entire activity. Traditional players will swear that a card counting plan of greater complexity is more prone to problems, evening out the additional accuracy enabled by the application of computers. Anyone can discover many game plans for 21 card counting by going internet pages devoted to the game. With the game growing in popularity in casinos around the world, there are newer tactics being developed every other day. One can discover literally hundreds of internet pages providing you hints on card counting and the overall scheme to make money playing black jack.