Located in the Member Communications area within Wiki Settings, the Site Greeting allows you to configure a custom greeting that displays on any content page when a user first arrives on your site. It’s a great way to let everyone know the purpose of your site and to entice them to join.

Be sure to use the 'New Member Message' to send a private welcome message to new users once they join your site as well. It's a great way to let them know about the messaging feature and tell them how they can help out on the wiki.