what is google sandbox?

Google's sandbox is a relatively new filter that appeared to be put in place back in March of 2004. This happened after the widely publicized updates of Austin and Florida, and the implementation of what is known as the Austin update. If you are not sure what those are, there is no need to worry as those updates are now for the most part in the past. The sandbox filter seems to affect nearly all new websites placing them on an initial "probation" status. The effect of this is that new websites may get into Google's SERP's (search engine results pages) relatively quickly and may even perform well for a couple of weeks. When the filter is applied to the new website it is referred to as being put in the "sandbox". The new website will still show in the result pages, but it will not rank well regardless of how much original, well optimized content and regardless of how many quality inbound links the site may have. The filter restrains new websites from having immediate success in the search engine result pages.

It is filter which penalize a site for doing over linking and for any practices which are not approved by search engine. Website will be in Probation for certain period and will become live after that.

Google put newly registered sites or frequently updated sites in the search engine result on sandbox they can prove worthy of ranking.

The Sandbox is a name given to an observation about the way Google ranks web pages in its index. It is the subject of much debate—its existence has been written about since 2004 but not confirmed, with several statements to the contrary.

Errr... Something like sandbox does not exist. Back in 2005, webmasters believe that Google restricts the performance of new websites (I don't know why), but this was never confirmed by any of the Google representatives.

Thank you so much.....I want to know it is any kind of algorithm?

The Google Sandbox Effect is a theory used to explain why newly-registered domains or domains with frequent ownership changes rank poorly in Google Search Engine Results Pages (SERPS). In other words new websites are put into a “sandbox” or a holding area and have their search ratings on hold until they can prove worthy of ranking.

Those site which are increasing back links by using spam techniques. If this spam techniques are noticed by Google search engine then it put this site in side box which is known as sand box. It give negative effect to the site and decreased site page rank. Because once the site goes in sand box it also reduces it visibility.

hi
its the time period in which new site is out of ranking and search engine review this site in this time period.