The document discusses the importance of using clear, plain language when communicating, especially on the web and with web 2.0 technologies. It notes that unclear, obscure language can frustrate users and hurt products and brands. It provides several examples of unclear language from websites and software and suggests simpler alternatives. The document advocates explaining technologies and products in simple, straightforward terms that answer the basic questions of what it is, who it's for, and how someone can use it.