With the WDFIDF Top Ten Calculator WordPress Plugin you can optimize your texts for search engines according to the latest rules. Keyword-Density was yesterday! It analyzes your text to the specified keyword and to determine the top 10 rankings of google. In the next step, the plugin crawls the 10 most frequent keywords on every page of the google top 10 and analyzed this set of hand WDF * IDF formula in relation to the own content.