Where do I find Searchgenres in Sitecore? 

/sitecore/content/Repository/searchgenres

How to create a Searchgenre

  • Insert a new Searchgenre
  • Insert a new Searchgenre Item. Under Subgenres, add the Title and tags you want to be able to filter on. 
  • Continue above steps if you want to create multiple filter genres.
  • Save and publish Searchgenre and sub-items.
  • Add the Searchgenre to your List Page under Data Sources > Filters.

There already exists an "empty filter" (/sitecore/content/Repository/searchgenres/empty filter) that you can add if you want no filters at all to show.