Apple iOS 6 makes it easier to share photos with people who use iCloud on iOS 6 devices, or on Macs running Mountain Lion. In the Photos app, you select (tap) one or more images, hit the Share button, chose your recipients, and you're done. The photos will appear in your friends' iPhoto or Photo apps. However, the photo-sharing feature isn't nearly as seamless with outsiders (i.e., those without Apple devices), who'll have to view the images on the Web.
Photo Credit: Apple