This week Google (NASDAQ:GOOG) (NASDAQ:GOOGL)announced it'll bring free, high-speed Wi-Fi to 400 railway stations across India. The company says it's the country's largest public Wi-Fi project ever, and by the end of next year 100 stations will provide 10 million people with Internet access.

While Google should be praised for providing free Internet to millions of people, there's a very practical reason why the company wants to bring Internet to more Indians: By 2017, India will be the second-largest smartphone market in the world.

Google sees India's mobile growth as an opportunity to bring its services to millions of new people -- and the first step is getting them online. Click the video below to find out more.