Here's how you would use it in different situations:
* To welcome a group of people: "Bem-vindos!"
* To welcome a group of people, with a name: "Bem-vindos, amigos!" (Welcome, friends!)
* To welcome a group of people, in a formal setting: "Bem-vindos, senhoras e senhores." (Welcome, ladies and gentlemen.)
Let me know if you'd like to know how to say "welcome" in the singular form. 😊