Every single year, the global casino industry makes billions of dollars in profit. They use this money to build incredible hotels, to build indoor canals and fountains. But how exactly does a casino guarantee this massive income? Despite what many tourists think, casinos never rely on luck. They don't have to cheat. The whole industry is based on one math formula: the casino advantage. The house edge is the invisible mathematical tax that applies to every bet placed on the gaming floor. Understanding this concept and how it takes your money is the absolute most important piece of knowledge any gambler can possess before walking into a casino.