The best information I found on this subject so far is from this article: https://www.shopify.com/blog/1273154...es-infographic. It appears that Facebook is pretty good for sales/conversions in that article. Given my niche is online language tutoring, I'm guessing Facebook, Youtube, and maybe even LinkedIn would be the top 3 social media platforms that may yield the best ROI for me.
Based on your experience, what which social media platforms should I concentrate on? I can choose from Facebook, Youtube, LinkedIn, Twitter, Google+, Pinterest, Instagram, Vine, Reddit, Vimeo, etc.