No-limit hold'em was once only a tournament game. Cash games were rarely spread in conventional poker rooms, let alone the Internet. All of that changed when the game started sprouting up at casinos of all types.
No-limit hold'em is now the most popular form of poker. Tournaments pushed it to the forefront, and a great deal of money can also pushed it to the forefront, and a great deal of money can also be won here. But despite that fact, many players feel frustrated with their results. They win some money, only to lose it all on one botches hand.