The Google sandbox theory is describes as a Dampening Filter or program that is applied to new websites to hold them back from their true Search Engine Position Ranks (SERPs).

For major Keywords it is assumed to reduce the amount of new websites within the SE results and give some consistency to the Search Engine Results. It is speculated that the Sandbox Effect last anywhere for 2 to 6 to 9 months. It is also speculated that the Sandbox Filter is used to reduce Spam websites and short-term link brokering.

From researching with many keywords and client sites, I have noticed that if a search term contains less than 1 million results, the Sandbox Effect is not in place. I can optimize sites for irrelevant terms and rank as soon as the site is indexed by Google. Terms that have more than 1 million results do seem to have the sandbox effect. However there is no statistical data to prove a sandbox effect is actually taking place. Reason being, that terms that have 1 million plus results have websites that are fully optimized and have significant keyword back links, and proper on site SEO.

Regardless if there is a Sandbox Effect or not, every webmaster should work on their On site SEO and Off site Linking Strategy. Keyword Rich Back links from Various C-Block IPs and one way links are the best.

The Sandbox theory can be used in your advantage if you are dampened in major keywords. Utilize the time to create more back links, add more fresh content to your pages, work on adding features such as blogs, and research your topic to provide the most relevant content in order to be considered an authority on your topic. Dont let the Myths of a Sandbox theory cause you to stop making improvements upon your site. Consistent fresh material, and updates to your site will benefit you in the long run.

When Linking avoid if possible reciprocal Links, avoid links for Bad neighborhoods, and use common sense in your linking process. A high number of links in any given period could send up red flags to the SEs. Work on consistent linking in a timely manner. Dont go hog wild and purchase 1000s of links in a one monthly time span for example.

If you feel your site is being dampened by the SE Sandbox, filter, use the time to work on good links, and also, develop other websites as well. That way you constantly have sites that are Out of the Sandbox and can receive their true SERP positions.