At the moment that's Despacito. 5,494,270,378 views and counting. The first to a billion was Gangnam Style from Korean PSY. It's all about going viral. There is no such thing as a step by step guide...
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It's probably O.G. Kush from California. It has a very unique taste and is VERY strong. Do not smoke O.G. Kush if you are a beginner. Checkout: https://www.wikileaf.com/strain/og-kush/
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I recommand you give Polymail a try. They offer a free plan and it works great. Also Postbox just got an update that looks really good.
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