With the Search Manager you can see details of existing search filters and create new filters.
Filtered search is a powerful search feature that allows users to filter and customize their results by applying multiple filters to their search results in a navigational way. Filtered search breaks up search results into multiple categories, typically showing counts for each, and allows the user to drill down or further restrict their search results based on those filters.
You can configure filtered search either by using configuration files or by using the Search Manager.