Abstract
The presentation from Wikiconference 2011 discusses the problems of non-encyclopedic significance and importance of Wikipedia, focusing on the problems of Wikipedia in terms of measuring and evaluating the significance of topics in society through measurement and evaluation Wikipedia's encyclopedic content, non-encyclopedic content and also the outputs of tools and services that work with Wikipedia's content. Selected encyclopedic contents, non-encyclopedic contents and internal and external services and tools that work with the content of Wikipedia are briefly introduced, including their primary significance, which is especially maintenance of Wikipedia, but also their secondary significance, which consists in measuring and evaluating the possible significance of the topics in society.