When handled well, Q&A–questions and answers–becomes the most important element of a presentation.
A presentation is not an information dump. It’s not the opportunity for presenters to say everything they know about the topic at hand. It’s not a one-way transfer of knowledge.
That’s not how adults learn. Adults want to be involved in what they’re learning.
A presentation is like a focused conversation. They build on what the audience already knows. And they keep adding to it.
And presenters–effective ones, at least–give their audiences time to absorb and think about what they’ve said.
Q&A allow the audience to engage with the presenter and the content of the presentation. The more the engagement, the better the presentation.