Deacons - the Biblical definition
Simply put, a deacon is a servant of God ministering to others in the Body of Christ. The early church deacons were the ones who attended to the people's needs in the church so that the ministers would be able to minister and not have to worry about whether everyone had a seat or were greeted or had food.
Without Deacons and the Ministry of Helps, our modern day preachers would be running the praise and worship, greeting at the door, making sure everyone was fed at fellowship meals, changing light bulbs, etc. We are blessed to have men like these who can take that burden off our Pastors and let them do what God has called them to do - train up the saints and equip them to do God's work.