What so you call the person who introduces a speaker?

The person who introduces a speaker is typically called a master of ceremonies (MC), introducer, or presenter.

Here are some other less common terms:

* Emcee (short for master of ceremonies)

* Keynote speaker introducer (if the speaker is giving a keynote address)

* Guest speaker introducer

* Moderator (if the person is also facilitating a discussion or Q&A session)

The best term to use depends on the context and the specific role of the person.