Which social media is best to increase popularity very fast?

[EriTay]

I can't believe 7 people are giving advice without asking you what business field you're working in. Not every social media network is suitable for your specific business.

For example, if you work more visually, as a designer or photographer, you should focus on Instagram or Pinterest. If you have a local shop, you should be well-known and connected in your area, where Facebook would help you. If you want to do some B2B stuff, you're might be better off using Twitter and chat to other business people. You see - it strongly depends on what you are doing.