The Indian electorate is larger than the combined population of these four countries.
"The enormity of this is quite well established, and this is one of the reasons why we believe it is also one of our main priorities for maintaining safe and secure elections in India," Shivnath Thukral, director, told CNN Business. of Facebook's public policies in India..
"We have been working for months and applying different learning from different parts of the world to … ensure that there is no abuse on the platform," he added.
It will not be easy.
The risk of violence
The concern is that social media could be used to deepen those divisions, particularly through disinformation around elections, and trigger violence.
"When those tools are used as weapons, not so much for smear campaigns or political satire, but when they are used as a tool for social polarization … the damage goes beyond the framework of the elections," he added.
In the last elections, social media was used to spread the message. This time, the dangers are coming to the fore.
"Any information automatically generates counter-information, and any false information generates counterfeit information," Verniers said. "In a sense, one could say that Indian political parties are very good at interfering with their elections."
The Thukral of Facebook downplayed the suggestions that social networks are armed.
"Obviously there is a responsibility for us to make sure that the bad actors or the abuse of the platform are not becoming the biggest game. I would say that Facebook remains a platform where good ideas, good storytelling, good ideas and ideas are shared, "he said.
Millions vulnerable to misinformation
The vastness of the elections in India represents a great challenge for social media companies.
In 2014, India had about 250 million Internet users. More than 560 million people are online.
"Owning a phone and having an Internet connection has become much cheaper and pretty much anyone with a phone now has WhatsApp, so it's a much higher reach," says Pratik Sinha, founder of Alt News. "At the same time, the amount of Internet literacy in large segments of the population is not close to anyone."
Alt News, founded two years ago, is one of several fact-checking websites that have been launched since the last Indian elections in 2014, as viral scams on social media become a greater threat.
"I think political parties are reasonably motivated and have enough money to add more work to ensure that propaganda reaches the last person," Sinha said. "I don't think anything can be done about the elections."
The repression of social media
Facebook and Twitter have took several steps to ensure that their platforms are not abused.
"We deeply respect the integrity of the electoral process and are committed to providing a service that promotes and facilitates a free and open democratic debate," he said in a statement by Colin Crowell, head of Twitter's global public policy. "2019 [election] it is a priority for the company, "he added.
Crowell recently appeared before an Indian parliamentary commission to testify about the "protection of citizens' rights" online, as did his Facebook counterpart Joel Kaplan.
Facebook declined to comment on what was discussed, while Twitter did not respond to a request for comment.
But Kaplan said in a statement after the hearing that he was grateful to the Committee on Opportunity to "show how we are preparing for the Indian elections and to help keep people safe".
Political candidates will also be asked to share details of their social media accounts with Indian electoral authorities, Sun El Arora, Commissioner for the main elections, announced on Sunday. The parties will also be required to post political announcements on social media pre-approved by the Electoral Commission and declare how much they have spent on social media advertising.
"Facebook, Twitter, Google and YouTube have committed themselves in writing to ensure that any political advertisements published on their platforms are certified," said Arora.
The WhatsApp problem
The messaging platform has also limited to five the number of chats to which a single message can be forwarded.
But each WhatsApp group can have up to 256 people, which means that a message can still reach 1,280 people at the touch of a button.
"The speed that disinformation once gets is out there and it's something that captures people's imagination, so it's shared like crazy," Sinha said. "And it is that speed that must be stopped, so that the least amount of people are affected".
Beyond the election
In many ways, the election will serve as a litmus test to understand how the internet of India, second only to China's size, will grow and progress in the future. The rapid boom in user numbers poses an ever greater challenge to the government and technology companies to keep them safe.
"The fact that this is happening so quickly in India means huge mistakes will be made and people will end up being massively misinformed," Agrawal said.
Sugam Pokharel of CNN contributed to this report.