A welcome bonus is a bonus that a casino offers its players once they join their site. It's a way to appreciate new customers and encourage them to play. However, any winnings from the welcome bonus may have to be used to make other bets before any withdrawals can be made.
The modern Islamic Republic of Iran is the direct successor of Persia, one of the most long-standing empires in history, having lasted for millennia. Unsurprisingly, the government has banned all forms of gambling due to the religious ban on games of chance. The ban is rigidly enforced, and international mobile online gambling casinos are blocked.