The guide provides an overview of using the Morgan npm module for logging requests in web applications built on Express and similar frameworks. Morgan is a middleware function designed to log incoming request information, such as methods, origin IPs, and URLs, with flexibility in formatting and output destination. It offers predefined log formats like "combined" and "dev," and allows custom formats using tokens. The module supports output redirection using Node.js Streams, enabling logs to be written to files or other destinations. Morgan's simplicity and focus on request logging make it a valuable tool alongside other loggers like Winston, as it allows developers to efficiently monitor and customize request logging within middleware architecture.