The keyword density describes a key figure in search engine optimization and refers to the ratio of the search term to the total number of words within a text. Google is supposed to recognize which topic the web page is about based on the keyword density.
Keyword density has long been used as an indicator of optimal content. In the meantime, however, this number is taking a back seat in favor of term weighting. The calculation of keyword density also dates from a time after keyword stuffing. Here webmasters wanted to counteract penalties, as the keyword density was established as an indicator for spam.
The formula for calculating the keyword density
[Number of search term] x 100 : [Total number of words] = [Keyword Density in percent].
Since there is no precise information on the optimal keyword density within a text, an optimum of three to five percent is assumed on the basis of tests and various sources. However, this varies according to topic and search term. Keyword density reached its limits with the establishment of term weighting and has therefore since been replaced by WDF*IDF.
Thematically relevant sub-pages: