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 do not use iCloud.
Photos and videos in a shared album do not count towards your iCloud storage.
Note: To prevent unintended or excessive use, Shared Albums limits the number of photos that can be uploaded within a given hour, day or month. See the Apple Support article My Photo Stream and Shared Albums limits.