This is to add the so called "Basic" filters to the community hub UI. That is, features that don't require any extra UI beyond a text box or a select drop down. These should modify the page's URL (probably through query strings, which the data layer will use to call the API to get new data, which will then be rendered back into the view. These filters are already part of the community hub home page, so they should be pretty simple to actually get the data for.
This is done now. The work happened mostly in https://github.com/mozilla/kitsune/pull/2430. It has been deployed to stage and prod. Product filtering was moved to another bug, which will be coming along shortly.