Show HN: Wedspin, Simple immersive wedding invites

At the first glance, I was very impressed with the design but I was unsure what the website is about. I was able to test out the app and what I got from it was that it is a slideshow with captions. Am I missing any features?

I would love to have some feedback around the app.<p>I am also wondering on the best ways to monetize the idea. All tips would be really helpful.