Many newcomers to our projects come through specific programs, such as an Art+Feminism edit-a-thon, a Wiki Loves Monument campaign, or a senior citizen training. We could build a homepage module that is shown to users who enter through those programs, making it clear that they are in the right place and recognizing them for joining through that program. Communities could configure links in that module to show newcomers relevant pages from that program.
One challenge would be how to know which users come from which programs. We could use the welcome survey to do this, or we could import a list of user_ids who signed up, potentially via the Program and Events Dashboard.