I have been unable to find any information about how or why to use the Recommendations setting to add Predefined Recommendations.
I did find another discussion thread asking about it, but it was never answered.
We are interested in implementing this feature, but need to understand it.
Hey Lisa - I added a comment to Re: What is the function of "Recommendations" in the Admin Console > System > Settings > Recommendations? that hopefully adds some details around what that setting does.
In short, it will allow you to manually add content that shows up in the "Recommended" list under the Content page in Jive: