Master of Ceremonies
In 1603, James I created a new post at the English court: the Master of the Ceremonies. His job was to receive foreign ambassadors and present them to the king. Get it right and nations stayed friendly. Get the order of precedence wrong, seat the Spanish envoy below the French one, and you could cause a diplomatic incident.
By the 1790s the title was being shortened to M.C. By the 1930s it had become emcee, and the job had moved from palaces to ballrooms, radio and, eventually, hip-hop. But the core of the role hasn't changed in four hundred years. The MC's job is to make everyone else look good.
Which is why most corporate events get it backwards.
The MC is usually the last decision on the list, and often handed to someone from inside the organisation who "could handle it". In fact, the MC is the most important person at your event. They're the only one who never gets a break, has to listen to every word, and deals with every disaster in public, with no second take. A good MC can rescue a weak program. A poor one can sink a strong one. Book the MC first, and budget for them first.
If you've been handed the microphone yourself, here's how to do the job.
It's your stage. Everyone else is a guest. That means two things: make your guests feel welcome and looked after, and tell them the rules. Most MCs do the first and skip the second. Speakers who don't know their time, purpose and role are very hard to make look good.
Introductions are simple. Say what the subject is, why it matters to this audience, and why this speaker is the person to talk about it. Then stop. Don't steal their material with a mini-speech of your own. The last words out of your mouth are the speaker's name: "Please welcome the Managing Director of Widgets Inc., Jane Smith."
Thank-yous are hard. Don't summarise their key points; the audience was there. Find what the talk meant, to the room or to you, and say that. A personal, specific thank-you lands. A list of takeaways sounds like a minute-taker.
Every link needs a thread. What you say between speakers should connect what came before to what's coming next. No weather small talk, no random jokes. The thread can be thin, but it has to be there.
You're the audience's voice. The room looks to the MC to set the energy, calm it down, lift it up and say what everyone was thinking. That's a privilege. Treat it like one.
The original Master of the Ceremonies kept the peace between kingdoms. Yours only has to keep the peace between the CEO and the run sheet. The principle is the same: nobody should notice you doing it, and everyone should look good because you did.