Action - Take a series of photos of someone moving (dancing, running, jumping) and Auto Awesome will merge them together into one action shot where you can see the full range of movements in a single image, capturing the movement in one captivating still.
Pano - If you've taken a series of photos with overlapping landscape views, Auto Awesome will stitch these photos together into a panoramic image.
HDR - High Dynamic Range is the process of taking multiple exposures of the same image. By merging these images together, your photos will achieve a greater range of shadows and light. Uploading three similar images at different exposures--low, medium, and high exposure--will create an HDR image for you.
Motion - If you've taken a series of photos in succession (at least 5), Auto Awesome will stitch these photos together into a short animation.
What you see below is the animation Google has done to my formerly static photo of a cabin in the snow in Maine