What’s so great about this blogging thing?

Valeria Maltoni posed the question:

You’ve just closed the elevator door, and the CMO asks you “What’s so great about this blogging thing?” Obviously, it’s a pretty broad topic — but you only have 10 floors to the lobby.

What do you want him to remember when the door opens?

Here’s what I would say:

Read others’ responses here.

What would you say?