Google Dance

The "Google Dance" refers to Google monthly index update cycle. The index is a database all the sites and URL that Google is aware of (and it is a lot). The index contain much more information about sites as well. You will be surprised by the types of information that are contained in the Google database. The important thing here is that the index along with the PR rank of the site determines what comes up in the search results and in what position. How your site rank in specify keywords is determined by this index.

Google has many servers that maintain its index. At the present time, it is guessed that Google has at least 10 major data centers. The three most famous being www.google.com, www2.google.com, and www3.google.com. Because these index can not always be in synch, a Google query that is processed on one server may give different results that comes from another server. It is called a "dance" because of this constantly fluctuating result.

There are tools such as google-dance-tool, that will show you Google results from the various data centers. If the results are different, it is said that the google index are dancing. And you know that Google is in the process of updating its index. This update occurs on average about once a month.

This is not to say that the Googlebot will visit your site only once a month. On the contrary, for the majority of site, the Googlebot come much more frequently than that. But according to Google, it should never visit more than once every few second.

Next

In the next lesson, you will learn about the Googlebot.