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.
Switzerland is at the heart of Europe, at least in terms of geography. Famous for its political neutrality, it hosts several international organizations. Gambling in bricks-and-mortar casinos has long been a tradition in Switzerland, but online casinos are formally illegal. In practice, it is possible for the Swiss to play in international mobile and online gambling casinos.