A "user guide" is a document that provides instructions and information on how to use a product or service. There are several synonyms that can be used to describe this type of document. One option is an "instruction manual," which typically contains step-by-step guidance on how to set up and use a product. Another synonym is a "guidebook," which provides information on the features and benefits of a product or service. Other synonyms for a user guide include a "how-to manual" and a "reference guide," both of which provide detailed information on how to use a product effectively. Regardless of the name, a user guide is an essential resource for anyone using a new product or service.