I got this in a recent bundle purchase and didn't think I would have any use for it, but I started playing around with it anyway. I do some website design, and my friends and family are loving this app. It is so cool!
When you mouse over an area of a photo that you have designated, it will then perform the action you have set for it. For example, I was showing my friends the Victoria, BC Inner Harbour from a recent vacation. I had set up areas so that when they clicked on a specific hotel, park, garden, etc., I could have it open a page showing that area in more detail. Try it and see if you don't love it!