Casino edge, house edge, or casino advantage are gambling terms used to describe the advantage the casino has over the players.
Every gambling game comes with a small house edge that gives the casino an advantage over the players. This helps the house ensure a steady profit and make money in the long run.
For example, in blackjack, the house edge is around 1%. What this means is that for every $100 wagered, the casino will earn $1 in the long run.