The "House Edge" refers to the mathematical advantage that a casino or gambling establishment has over players in games of chance. It is expressed as a percentage and indicates how much of each bet the casino expects to keep over time. For example, if a game has a house edge of 5%, the casino anticipates retaining 5% of all bets made on that game. This concept applies to various games, including blackjack, roulette, and slot machines. Understanding the house edge helps players make informed decisions about which games to play and how to manage their bankroll effectively, as it highlights the likelihood of losing money over time.