The driving forces behind India’s forecasted jump in digital advertising over the next few years will be voice, video and vernacular due to the lowering data costs.

In media reports, Ashish Bhasin, chairman and chief executive - South Asia, Dentsu Aegis Network (DAN) noted that India has about 500 million people on the internet today and in the next three to four years, another 300-400 million people will join in.

“Concurrently, the next phase of internet users will speak regional languages and as a result you will probably see a lot more advertising in regional languages on digital in the years to come," he said.

A report published by DAN earlier this year estimates that spend on digital advertising in India will grow at a compounded annual rate of over 30% in the next few years, and that digital will constitute 29% of the ad market by 2021.