But so far, the payoff has been small: Facebook earns 15 cents per user in India every quarter, compared to the $7 to $8 it makes on each U.S. user, according to analysts.
Facebook does not break out its revenues in India, but Neil Shah, an analyst at Counterpoint Research, a Hong Kong-based technology consulting firm, estimates it brings in $15 million a quarter, far behind the $350 million he estimates Google earns there per quarter.
Google, which set up in India in 2004, has been in the Indian market six years longer than Facebook, and its search ads are more familiar to advertisers there than the display ads Facebook offers.
The business-boosting features, described to Reuters by company executives and Indian business people, are aimed at advertisers such as Mohit Khattar, managing director at online grocery company Godrej Nature's Basket, one of the roughly 60 to 65 million small- and medium-sized businesses in the country.
He said he began advertising on Facebook about two months ago as the company ramped up its online presence. He found that advertising in-store events and sales helped attract customers, but would not provide specific figures.
"Since our customers are on Facebook, we are on Facebook. It's that simple," Khattar said.
Facebook declined to say how many staff members it has in India or how much it has invested since it launched operations there in 2010.
But the world's largest social network says it has seen early signs its efforts are working. The company unveiled a new type of ad designed specifically for India last year, called "click to missed call."
Users click a button on an ad, which automatically calls an advertiser. The user hangs up - to save them the charge for the call - and the advertiser calls back with a pre-recorded message.
Garnier Men, a leading men's hair care company in India and a unit of beauty products giant L'Oreal SA, saw online sales more than double by using click to missed call, according to Facebook and the company.
TV ADS
But Indian advertisers still overwhelmingly flock to television ads and remain skeptical of the value of advertising on social media, analysts and business executives said.