There are a variety of search engines , but few of which are really relevant and used. In German-speaking search engine Google is despite a slight decline in numbers of the industry leader in the search market with a search request coverage of nearly 90%. For this reason, this is tutorial specifically with the search engine Google employed.

The aim of this tutorial is to identify the factors that determine the ranking of a website in search engines. These factors are only partially explained publicly as a search engine must remain as resistant to manipulation because only an objective assessment of sites is possible. In addition to identifying the various factors are discussed, weighted and evaluated for their practicality.

A kind of index to the topic of SEO with an explanation of various terms and the people who played a role in this context.

An overview of the history and development of search engines over the years.