A gambling license is a document that regulates the work of a company in one or several countries. A casino without such permission is considered illegal, and the owner of the resource may be subject to the sanctions of state authorities.
Gambling operators have to pay significant amounts for issuing and renewing licenses. However, they also will get lots of benefits. It is much easier to buy high-quality software and enter into contracts with financial institutions for legal resources.
Moreover, experienced gamblers pay attention to the presence of online casino license. They make large bets only on reliable gambling websites.