I am having a heck of a time finding information on how the search bar on the Customer Portal functions.
I am not talking about them searching their past tickets I am talking about the search bar at the top of my landing page.

I have been struggling with how to optimize this to find suitable suggestions, and nothing seems to work. I have added standard keywords for all request types, labels, articles, etc.
Aside from paying for yet another add-in, can someone explain how this works and how to make it work properly?