Drupal’s built-in Search module offers powerful, flexible searching features and intelligent ranking of results. Behind the scenes, it’s silently building an index of all the words used in the site’s content. When users search for a phrase on the site, content is ranked using customizable rules and displayed in order of relevance. On any Drupal site, you can refine these rules by going to the administrative toolbar and clicking Configuration?“Search and Metadata”?Search Settings (admin/config/search/settings) and changing the Content Ranking weights, pictured in Figure 5-18.

Figure 5-18. The Search module’s content ranking settings

The Search module also offers more detailed options for sites with large amounts of content. The Advanced Search screen, pictured in Figure 5-19, allows users to choose exactly what content they want to search, filtering based on content type, free tagging terms, and other criteria.