Massive indexation of the web by Googlebot in the course of which it analyses in depth all pages of sites, and lists all links particularly. In general, it starts just after Google Dance and acts as a basis in Google Dance which follows.

Repetition of one (couple of) keyword(s) given in comparison with the total number of present words in a page.

Name of the directory of the plan ODP (Open Directory Project), the biggest and the most complete of the directories of the web edited by human beings. It is developed and maintained by a vast huge worldwide community of voluntary editors. Google uses her method of classification to index the present sites on the Web.