The text introduces cbq, a command-line REPL environment for N1QL that is packaged with Couchbase Server from version 4.0, noting its utility for learning and optimizing queries before application implementation. It explains that the location of cbq varies based on the operating system, providing specific paths for Mac OS X, Windows, and Linux. Additionally, it mentions the Query Workbench, a GUI tool that offers conveniences like query autocompletion and index status overviews, which is currently in developer preview for Mac, Linux, and Windows. Users are directed to download Query Workbench from the Couchbase downloads page and follow the provided guide.