Here are some examples:
* I ragazzi sono al parco. (The boys are at the park.)
* Ciao ragazzi! (Hi guys!)
* I ragazzi giocano a calcio. (The boys are playing soccer.)
"Ragazzi" can be used to refer to a group of young men, but it can also be used as a friendly and informal term for any group of people, regardless of age or gender.