Shared Albums
When you set up your device to use Photos with iCloud, you can turn on the Shared Albums feature (previously called iCloud Photo Sharing).
With Shared Albums, you can share photo albums with friends who use iCloud. You can also share an album on the web so anyone with the link can access it—even if they don’t use iCloud.
For more information, see the Apple Support article How to use Shared Albums in Photos on your iPhone, iPad, and Mac.