The sandbox effect or (site getting banned on google) has been prevalent in google for quite a long instant, and many websites are falling victim to it.

Whether deliberately or accidentally, these web sites get caught by so said (GOOGLE POLICE CRAWLER) and in a similar fashion your page domain goes to a prison cell. While staying in this prison cell for 2-3 or maybe 4 years, google police crawlers revisit the cell to check the status of the internet site domain.

If the page webmaster or whosoever handling the page notices that the site is not showing on google or any other search engine, and manages to pin point the defect in the page , your internet page gets back to life, otherwise your web page gets life imprisonment for rest of its life, and no one can bring it back, unless you are a hacker and go inside google database to modify your site details.

Normally all the people ignore the POLICE CRAWLERs in the first place, and later realize that it s too late. Its nice that you recognized that police crawler has penalized your page .

Google has a rule book of a fickle minded child which changes every 2-3 many years, and several sites which do not keep their sites updated with the changes in the algorithm google is using to crawl your website , gets off the track, and ultimately die a slow death.

Its more like a slow poison, where your web page dies not in a single day, but slowly, without your understanding, because google would never disclose openly that your web site has indeed been penalized.

Earlier the sites used to get penalized, and were immediately removed from the google search engine. Like for example, I was given task to restore the site www.yxz.com, about 4 years ago

Now some of the problems facing with the page we are

1)There url was not even showing on google.

Now closely examining site page by page I came to understand that one of their pages was pointing to their partner page www.abc.com, which received life imprisonment on google.

2) Moreover both we are sharing identical IP address, and the site received penalty on google.

Now if you are hiding a criminal in your house, you are also a part of active crime, and police will certainly punish you in the identical manner, maybe in a mild fashion.

I explained my theory, and recommended them to remove the backlink pointing to abc.com, and certain redirections on certain page, but they the owner was bit skeptical about what I was talking and gave me a lecture on whats the importance of www.abc.com for their business, and other Business Jargon

"OK I said", why not go for flash hyperlink on that particular page. and, problem got resolved and site got restored within a month.

The page was banned for more than a years, and nobody in the company looked into the matter why their page is not showing on google.

Thankfully the site got restored, but unluckily manager decided to close the business page since it has suffered good loss over a period of last one year due to several factors, one of them was their ranking on google, which was bringing them customers 30-50 every month from google and other search engines.

Similarly its important for any WEBMASTER, or the owner of the page to keep track of its rankings on google, because if some updates are done to the algorithm, it could be possible that your page is not adhering to the latest algorithm.

Good Luck
Bhupinder Singh