The article "Ajax: The Complete Reference" is a guide to developing web applications using Ajax technology. It covers how to create interactive websites that don't require constant page reloading. The book explains different ways to communicate between the web browser and server, handle different data formats, and address networking and security issues. It also discusses building user-friendly interfaces and solving common problems in Ajax development. The goal is to help readers understand and implement Ajax in their web projects, using real-world examples and practical advice.