In India, most people won’t ask you for a business card to get your contact info. Instead, they’ll ask you if you use WhatsApp. Your neighborhood grocer will accept orders for home delivering your weekly shopping list through the app. Your extended family – all 75 of your cousins, grandparents, and everyone in between – will keep in touch in a single group chat on the platform. And your country’s ruling political party will broadcast messages urging you to support them through the app. With more than 250 million users, WhatsApp is perhaps the single most impactful digital service in India.…

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