FAQ: What is the Difference Between a Filter and a Query Filter?
Filters (1) are groups of query filters. That means that you want to offer Filters to the user based on available metadata values of a content (result set) e.g. Filters "Media type" allows the user to filter for all content tagged with a media type or Filter for "Department" allows the user to filter content tagged with a department. Picturepark offers an editor for configuration.
{
"kind": "TermFilter",
"field": "fieldpath",
"term": "Europe"
}