What is Google dance and it's effects???
 

Can I ask what is google dance in specific, and how long does it take?

Google Dance is a term which is used to describe the period of time in which Google uses to rebuild its rankings and during this process of this rebuilding and rankings of websites.

It is the time interval that Google takes to rebuilds its ranking

The google dance is the monthly update the google search engine database this is used to describe the period of time which google used to rebuild his rankings.