A priest has all the responsibilities of a deacon and teacher.He also has the following responsibilities: He is to “preach, teach, expound, exhort, …
He sets a good example for fellow quorum members and other Church members. He serves as a standing minister, “appointed to watch over the church” (D&C 1).
He is also to “warn, expound, exhort, and teach, and invite all to come unto Christ” (D&C ). This responsibility may include gathering fast offerings, caring for the poor and needy, caring for the meetinghouse and grounds, and serving as a messenger for the bishop in Church meetings.
He also has the following responsibilities: He prepares the sacrament (see 20.4.2).
He is to “watch over the church always, and be with and strengthen them” (D&C ).
One way he does this is by serving as a home teacher.