I would say when you're first starting to experiment with as many different platforms as you can. Currently I'm using Reddit, Twitter, Instagram, Snapchat, Pinterest, Facebook, Periscope, Balb.im and Google+. Then after awhile, look at your data and follow Pareto's 80/20 principle. So look at the social medias that are giving you actual results, and then devote 80% of your time getting even better in those few, while still continuing to experiment with other platforms using the remaining 20% of your time. For me, I quickly realized Reddit was giving me over 30% of my views. So then I did research on it daily, giving it more focus, and now it gives me 60% of my views.