The web has travelled a long way from its first website created in 1990. With its continuous revolutionary development, new used concepts and modern technologies, it became an important part of our everyday life. The web is not just a static database with information anymore, but a tool for many business processes and ordinary daily tasks. This shift was already exposed in 2004, and from then the web has acquired a new term, exactly Web 2.0, which relates to the second generation of the web and has the following properties: dynamics, interactivity, interoperability, information connectivity, user-generated content and the ability for providing user participation. In this diploma thesis I presented the web in its second evolution phase and t...