“You may be wondering why I called this meeting.”
Your company has just made some big changes to how it is organized. Not all employees know about the changes yet. You call a quick meeting to tell the people who work under you. You didn't explain what the meeting was about when you invited everyone, so when it starts you say this.
You may be wondering why I called this meeting.
You can talk about what you think someone might be thinking with this phrase. For example:
You may be wondering why we changed it. Well, to be perfectly honest, it was a cost-cutting decision.
You may be wondering what this number over here means. That's the percentage of people in our survey that said that they only watch TV shows over the Internet.
People usually say "You may be wondering..." in speeches, essays, or other situations in which the audience can't speak back easily. In a one-on-one conversation with someone, you can ask a direct question:
Are you wondering how much it cost?
"Calling" a meeting means telling or asking a group of people to have a meeting.
You usually "call" a meeting to talk about something important and unexpected.
Mike called a meeting this morning to tell us about Lana getting fired.
I wanted to call a meeting because we've recently had a bunch of errors slip past us, and we need to make sure that that doesn't happen.
For meetings that are on a regular schedule, you don't use this phrase:
We have a regular meeting every Monday morning.