Introduce the topic of your webinar - is it a problem you're helping to solve, a service, or giving a tutorial? Give a brief overview.
You can use list slides to make your content more easy to read and digest. To learn more about lists, check out this blog post:
http://blog.haikudeck.com/presentation-ideas-lists-the-haiku-deck-way/Our power tips for creating list slides:
http://blog.haikudeck.com/power-tips-for-haiku-deck-lists/