Hi Everyone..
can any one tell me where is the google's corporate office?

Hey man I only know about Google head office and had seen its documentary in one of the TV channel. There I got some knowledge how Google office runs? Google office head office is in California. And do you know to move from one department to another we need to use the official vehicle inside office territory. The document was mainly based on Google search and SEO. The documentary contain something on Page Rank, Landing page Optimization, How key words are developed and how can it come to the first page of Google search.

Google's head office is located in Mountain View, California. Except this, there are many other office locations too. You can try this link for more about Google offices
http://www.google.com/corporate/address.html

BTW, while talking about Landing Page Optimization, this is not the service offered by Google but Google provides applications like website optimizer to test your own website.