Google Photos is trying to streamline group photo albums by allowing anyone with a link to contribute their own pictures.
With the latest Google Photos update for iOS, Android, and the web, users can create a shared album from any cluster of photos. This generates a link, which can be copied, pasted, or shared to other apps and social networks. Once someone else has that link, they can upload pictures and add the collection to their own Google Photos library.
Compared to other image sharing platforms, Google’s is decidedly bare-bones. There’s no way to comment or “like” an image, as you can with Facebook or iCloud Photo Sharing, and there are no options for face tagging beyond the automatic (and private) image recognition that Google Photos performs automatically.