We learn what it means to follow Jesus through his interaction with Peter. Jesus asks Peter three times whether he loves him, and each time, when Peter confirms that he does, Jesus tells him to "feed my sheep." Love for Jesus is demonstrated in feeding his sheep.
The idea of feeding Jesus' sheep is simple: it describes the care of and ministry to those who belong to Jesus. It describes discipleship. In each gospel, the parting words of Jesus to his followers is to become disciples who make disciples.
Let us live out this mission.