Controlled vocabularies are beneficial at the indexing process so that data providers and repositories apply the same term to refer to the same concept (e.g., person, place or thing) in a consistent way. This helps with search and discovery of content. Controlled vocabularies guide end-users to formulate their searches better as they may not know the correct term for a given concept. In fact, the most useful function of controlled vocabularies is to gather together variant terms and synonyms for concepts and link concepts in a logical order or organize them into categories. Thus, consolidating many different synonyms into one controlled term increases the number of useful hits returned by the search.