To directly answer your question,
As of January 2018 Virat Kohli is the second most followed Indain on Facebook with 37 Million followers right after the Prime Minister of India Narendra Modi with 43 Million followers.
When you become a player with huge potential, you are loved all across the globe and though we Indians sometimes despise of this fact due to his arrogance but this man continues to deliver with every match. Be it the test struggles in England or be it the thrashing of Windies, he has always made sure to be leading the way. But what adds to his charm is his status and the life goals he sets as a person off the cricket ground. It maybe his working out videos in the gym or the controversial clean India clip by his long term girlfriend turned wife Anushka Sharma. Being with her he also sets relationship goals for the youth of the country. Despite this pressure Kohli makes sure to say something way out of his league and the recent Bangladesh controversy in itself is an example. But after a long time the Indian Cricket team has got a captain who replies with both his Bat and words and is definitely achieving wisdom in the coming days.
His instagram flowers are - 25.6 Million and his twitter followers seems to be 8 Million literate people. It is the brand that Kohli has been carrying and also the attitude with which he plays both on and off the ground.