Shared photo streams let you share selected photos with just the people you choose. iOS 6 and OS X Mountain Lion users can subscribe to your shared photo streams, view the latest photos you’ve added, “like” individual photos, and leave comments—right from their devices. You can also create a public website for a shared photo stream, to share your photos with others over the web.
Note: Shared photo streams work over both Wi-Fi and cellular networks. Cellular data charges may apply.
Turn on Shared Photo Streams: Go to Settings > iCloud > Photo Stream.
Create a shared photo stream: Tap Photo Stream, then tap 
. To invite other iOS 6 or OS X Mountain Lion users to subscribe to your shared photo stream, enter their email addresses. To post the photo stream on icloud.com, turn on Public Website. Name the album, then tap Create.
Add photos to a shared photo stream: Select a photo, tap 
, tap Photo Stream, then select the shared photo stream. To add several photos from an album, tap Edit, select the photos, then tap Share.
Delete photos from a shared photo stream: Tap the shared photo stream, tap Edit, select the photos, then tap Delete.
Edit a shared photo stream: Tap Photo Stream, then tap 
. You can:
Rename the photo stream
Add or remove subscribers, and resend an invitation
Create a public website, and share the link
Delete the photo stream