Adding a join option to my group

I created a group in facebook, but I need to know how do I get others to "join" my group? What steps do I take to add a join button to my group page? I tried looking in settings but I do not see where to turn that option on. Please help!

Hello,

Topic moved to Groups support

The join button is automatically added to every group page - there is no need to enable it so long as your group`s privacy settings allows others to view & join the group.

You mentioned privacy settings, I do not see the privacy setting in the page I created. I created the group "The Mighty Second District of Omega Psi Phi Fraternity" but do not see the option for privacy. Where would that be?

Are you using Old groups or New groups?
Furthermore, could you kindly provide a link to the group?