On Palm Sunday we consider how Jesus wasn't the only person to enter Jerusalem that day. Thousands of pilgrims would have made the journey up to Jerusalem, as well as Pontius Pilate arriving with his large military entourage.
Jesus had a choice as to whether to enter the city and continue His walk towards His death on the cross. It was a week of awful suffering for Him and yet because of us He chose to die. We should in a similar way let Jesus enter our lives and obey Him, as He says, "Follow Me!"
The script for the whole Service can be read here.