This article discusses link-based ranking algorithms in web search engines. User studies show that users usually only look at the first few hits on the search engine results pages, which underlines the importance of results ranking. Documents which do not appear in the first few results are often omitted by the users and receive only a small attention. To list the “best” documents on top of the results pages, all web search engines use link-based ranking algorithms. These are described in this article. The main question is whether there are factors implied in these algorithms that prefer certain kinds of pages.