Popular social network site Facebook, which hopes to raise at least $5 billion in one of the world's most widely anticipated IPOs, or initial public offerings of stock, is betting big on India and Brazil.

Outlining its growth strategy in a filing made online with the Securities and Exchange Commission in Washington, Facebook said it "continued to focus on growing its user base across all geographies, including relatively less-penetrated, large markets such as Brazil, Germany, India, Japan, Russia, and South Korea."