Google Dance

The Google database exists on many servers spread throughout the world. A large update of the Google databases can take several days.

A Google dance is when the Google servers are out of sync with one another. Your web site could be the #7 result for your main keywords on one Google server, and the #1 result on another server.

In early 2004, Google seems to have changed the way they push updates to the datacenters. The Google servers now seem to be in a contant SERP dance.

The term Google Dance is now being used to describe Google's periodic update of backlink and PR numbers.