Google has launched Shared Albums in Google Photos making it possible to share photos and videos with multiple users at one place.
Albums can now be made collaborative and users can invite other users to add their photos and videos. Notifications will be sent everytime a new pic or video is added. Users can also save pics and videos from the shared albums to the Google Photos library.
No setup is required to create a Shared Album and it works all devices. Simple select the photos, create and album and share the link.