House Edge
The house edge is the percent of each bet that the casino expects to retain based on the structure and rules of the game. For the table games like roulette and blackjack, the house edge is the same for online and land casinos.
The house edges of slots at online casinos have to be declared in the public domain. This is not the case at land casinos and it is known that the house edges of land casino slots are comparatively higher.