Until now, Web 2.0 showed a new understanding of the Internet which allowed the sharing of information for all interested people via a platform. Examples of Web 2.0 applications are e.g. Youtube, Wikipedia, Facebook and others. The expansion of Web 2.0 is already being called Web 3.0 or semantic Web and is already the evolving new era of internet technology. Web 3.0 uses semantics as an intelligent connecting link in order to allow relationships between content, authors, services or users. It is thus oriented more towards structures and contextual, semantic as its predecessor. As such, it enables the user of Web 3.0 to access so called meta information, e.g. further information about an author or a topic. This is made possible by the use of collaborative indexing (tagging) and the access to semantic information. For companies or for marketing activities, Web 3.0 will become interesting as it can make the access to pertinent information about individual target groups easier.