Http://www.google.com is an American multinational corporation specializing in Internet-related services and products. This company includes product like
1) Google search - Nor 1 Keyword Searched is Facebook .com or FB
2) Google adwords- Advertising network
3) Google drive - File sharing cloud drive
4) Google adsense - Advertising for publishers.
5) Google Mail(Sign Up Procedure: https://www.youtube.com/watch?v=wqoPLXt731s) and Much More.
Based on country wise Google is having different Search engine Homepages Like Google India, google USA, Google UK. and much more.
Google as an search engine:
You can type whatever you wanted in the search query box. google will return you related information. with it's artificial intelligence algorithm. EX www.google.com search facebook or homepage or flipkart or any how to guides. google will list the related results than you can choose from any one of listed results. Google www.google.com Search facebook india homepage is the Toughest competitor for Facebook and Microsoft.