The document discusses upgrading websites to HTML5. It provides background on previous versions of the web, including Web 1.0 which was one-way communication, and Web 2.0 which enabled two-way communication and user-generated content. Web 3.0 is predicted to merge the internet with TV and use cloud services and semantic linking of information. The document advocates upgrading to HTML5, which will provide benefits like working across devices and platforms, enhanced rich media, mobile shopping integration, and better search engine optimization. Examples are given of how HTML5 can improve the mobile experience for websites compared to the older HTML4 standard.