These ordinances are meaningful rituals to remind us of what Jesus did for us to remind us that He is coming again in the future.
Both terms refer to the same ritual. Communion is an ordinance that believers practice in the church to remember what Christ did for us on the cross. Like baptism, taking communion does nothing to save you from hell. It is simply a picture, representing what Christ did for us on the cross. The bread represents Jesus being beaten and bruised for us. It pictures Him not only as the bread of life, but also the bread that was broken and brutally abused and beaten in our place. It represents the horrific pain and torture that Jesus went through before He was even placed on cross.
The juice represent the blood that was shed by Jesus on the cross to pay for our sins. The blood was shed through the nails hammered into His hands and feet. The blood was shed through the spear that was thrust through His side. The blood was shed from the wounds on His back where He was beaten, along from the crown of thorns which was pressed in His skull. Jesus shed all of His blood as the final sacrifice that completed the payment for sin, that millions of previous sacrifices of the Old Testament could not accomplish.
At the end of communion, it is good to remember three things: