This How-to is a small part of a much larger article. Please click here for the complete Photo Stream on iOS article.
#1 – Open the Photos app. (Be sure the lower right Photo Stream toggle is selected.) To create a new stream select the “+” button in the top left corner.
#2 – Invite the people you’d like to share the stream with by adding their email address. Give the Photo Stream a name. If you want the Photo Stream to be available to the public you can turn Public Website ON. Once you’re done select the “Create” button in the top right corner.
#3 – Your new stream will be listed. To view the stream simply select it.
#4 – Your recipients will receive an email invite to join the Shared Stream