Missions can refer to different things depending on the context, but generally, it refers to an organized effort to propagate a particular faith or message. Here are some examples of what missions can mean:

• Christian missions: This refers to an organized effort to propagate the Christian faith. It can involve sending individuals or groups across geographical boundaries to carry out evangelism or other activities, such as educational or hospital work.

• Mission trips: These are organized trips, usually by religious or humanitarian organizations, to carry out a specific mission or project in a particular location. There are different types of mission trips, including short-term, long-term, relational, and those that simply help people in need.

• Missions in general: This can refer to any organized effort to propagate a particular message or cause, not necessarily religious. For example, a political campaign might have a "mission" to get a particular candidate elected.

In general, missions involve an organized effort to spread a particular message or accomplish a particular goal. They can involve sending individuals or groups across geographical boundaries, and they can take many different forms depending on the context.