Example: You notice that some users enter the following query when they are looking for the server requirements for a software solution.
You also notice that this query does not return the item they are looking for because this item does not contain this keyword, rather containing requirements in its title and body.
You then add a thesaurus entry containing spec, specs, and requirements.
With this thesaurus entry, when a user enters spec or specs in the search box, in the background, the query is expanded to:
spec OR specs OR requirements
All items containing either keywords are returned, including the one they are typically looking for.
Learn what to consider before adding thesaurus rules (see Thesaurus Best Practices).