You need to reach your audience on a personal level, which is difficult to do online. This means that you need to include your audience in order to make your webinar a success. This may seem like an unnecessary reminder, but you can easily forget about your audience while you are moving through your presentation. Do not forget to provide a way for your audience to contact you during the presentation.
Take advantage of social media platforms and online chats, or allow your participants to call your moderator. Besides asking questions, your audience can tell you about any technical difficulties that are not occurring on your end. You ignore your audience at your own peril. If the audience feels that they are being ignored, they will perceive the webinar in a negative manner, and will be incited to look elsewhere.