FB, Ins & Snapchat is a must for dropshipping?

yes!!!!!!!!!!!!!!!!!! FB and especially ig are 100% necessary  

 I don't have Snapchat but I have FB, IG and Pinterest - they are SO important to have now  

It makes you more credible , people usually look up your store on google if they see a active Instagram with followers and FB, and YouTube . They will have more faith in your store /brand . That's why snow and hismile sell hundreds of millions in teeth whitening and others not. And same with fashionova for example