Maybe, the ceremony is the main moment of your entire wedding day. The master of ceremonies is a key to avoid boringness. To maintain balance between being close friendly and being formal. To show nicely without losing none a bit of entity at the magical moment.
Despite its simbolic nature, is your wedding. The ritual you’ll remember for the rest of your lives. Who guides the moment should know how to analize feelings and values. How to write it in order to modulate emotions; how to rule time and tempo. Should control how to communicate the message in order to share it whit all the guests, all this people who care for you. And –main issue– must know how to react to non expected reactions, adverse situations or technical problems. How to improvise to achieve the best result.