Any body who knows about it.. I have read many forums many blogs but didn't find any thing relevant.. Give some light in this.. Eager to know about it ..

When newly created website keywords rank high on search engine result page in short period of time at that time Google put your website on sand box and verify that whether website got rank by doing all ethical activities or use spam activities to get high rank.

When new websites are put into a "sandbox" and does not receive good rankings for keyword phrases that are not more competitive in Google after making the webpage search engine friendly and after being indexed.

Check out the following link to get more detail about Google Sandbox.

en.wikipedia.org/wiki/Sandbox_effect

When anyone use blackhat techniques to get his/her newly website in Google's #1 page then Google put it in "Sandbox". Always use white hat or search engine proven techniques.

yeah that sure charlesth .. the better way to know your answer, you must go to en.wikipedia.org

When newly created website keywords rank high on search engine result page in short period of time at that time Google put your website on sand box and verify that whether website got rank by doing all ethical activities or use spam activities to get high rank.

Google sandbox is a filter which is used for all new websites to prevent high ranking of website till they prove their implication on internet.

Hi,
Google sand-box is the named given to the strategy behind newly-registered domains and the domains with frequent ownership changes rank poorly in Google's SERP ranking.
Also, it is possible for a newly launched websites to make it to the top of Google Search Engine Results Pages (SERP) ranking of a website.

When newly created website keywords rank high on search engine result page in short period of time at that time Google put your website on sand box and verify that whether website got rank by doing all ethical activities or use spam activities to get high rank.

Google sandbox is used to check the newly ranked website whether that rank is gained by spamming or not.

The penalty or devaluation of websites in the Google search engine listings for a number of factors, including over optimisation. This practice began in the early part of 2004 and has since expanded to include a number of potential problem areas. 

The Google Sandbox is an alleged filter placed on new websites. The result is that a site does not receive good rankings for its important keywords. Even with good content, abundant incoming links and strong Google PageRank, a site is still adversely affected by the Sandbox effect.