Is there any documentation other than User Guide and Implementation Guide that explains how the KM Help sites should behave? Example: if I search on a Category Name, should it return all articles with that category name?
***Edited by Moderator Marissa to update platform capability tags***
On a help site, the user can select a category (or "View all") to view all of the associated articles available under that category. We've avoided adding categories within in the search results as that would bring back all the articles within a category. We do have a REST API that will bring back articles under a specified category, or another search activity could be created for this specific use case (e.g. search for a category passed in as a parameter, then return all linked articles, in a Resolved-Published status, perhaps other filters in case you need to exclude "internal-only" articles, for example.
I've attached a recent (7.31) Pega Knowledge Product Overview, that lists the key features of the application, including help sites and communities.