A vicar is someone who works for the church and helps the head person, who is called the pastor or the rector. The vicar is like the helper to the pastor and does many things to help the church run smoothly. They do things like visiting people who are sick, leading worship services, and helping with church programs. Think of it like a teacher's assistant in school, who helps the teacher with all sorts of things to make the classroom a happy place for everyone to learn.