1. One or more computer storage media having stored thereon multiple instructions that, responsive to execution by one or more processors, cause the one or more processors to implement a method comprising: receiving an image to be shared with other users based on input from a first user; identifying a second user from a tag of the image, the tag of the image associated with the second user and a region of the image; providing information, based at least in part on the tag, to one or both of the first user and the second user; determining, after editing of the image, whether the region of the image has been affected by the editing; and altering the tag if the region has been affected by the editing, otherwise leaving the tag unaltered.