An expansion deck is a presentation that provides a comprehensive overview of the benefits a customer has gained from your product, as well as the additional value they can realize if they expand with your product. Ideally, the expansion deck should help you engage with customers, share data that reinforces the value of the product, and help them understand why they need more of it. If you need some inspiration for what to include in your next expansion deck, check out this template with best practices and tips.