This document contains information about filtering search results with facets with the Apache Solr Search module.
The real power of the Apache Solr search technology comes into play when users only have a broad idea of what they are looking for when starting a search.
Search facets, also known as filters, are a part of the Solr search technology powering Acquia Search. They allow users to refine or sort their search result set. Users can begin with a general search and narrow down the result set as they understand better what content is available on your site.
Once a user has started a search by entering one or more search terms and clicking Search, the results page can feature a number of blocks that show filters, sorting links, the current search, and more. For example:
To learn more about search facets, read: