Faceted search.
also: facets · facet · facet countsShowing filter options with counts (category, brand, price range) computed from the current results, refining as users click.
the two-minute refresher
- 'running shoes' → 2,847 results, with Running Shoes (1,234), Trail Running (456)…
- Facets are aggregations over the matching documents.
- Selecting a facet adds a filter, and the other facet counts update.
- Costly on huge result sets: keep facet fields keyword-typed and cardinality bounded.