There probably isn’t a better superlative to describe this free service provided to all Google Plus users. Auto Awesome actually consists of a few edits that Google+ will make to your photos under the right circumstances.
The Auto Awesome features are as follows: (https://support.google.com/plus/answer/3113884?hl=en)
HDR, or 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 through Auto Awesome.
If you’ve taken a series of photos in succession (at least 5), Auto Awesome will stitch these photos together into a repeating short animation.
If you’ve taken a few group photos, Auto Awesome will choose the best shots of each person in your image and merge them into one great looking photo.
If you’ve taken a series of photos with overlapping landscape views, Auto Awesome will stitch these photos together into a panoramic image.
If you’ve taken a series of portraits sharing similar background elements, Auto Awesome will compile these photos together into a photobooth style grid. Mix is meant to showcase portrait photos taken with similar backgrounds in time, so it works best when there are close-ups of faces.
The features are really incredible when you consider that it happens automatically on Google’s servers. All you have to do is turn on Auto Upload on Google plus and start taking pictures. This is great for phones that don’t have great cameras or people who like to take good pictures but hate to edit them. You’ll receive a notification when your photos have finished uploading and/or there is a new Auto Awesome photo created by Google.
Don’t worry, all of your photos are private until you decide to share them with people. Even if you have auto upload turned on.
Last but certainly not least, Google Plus will automatically enhance every photo you take with a wonderful mix of color correction and contrast balancing. The results are really quite impressive.