I have a facebook page and twitter account for my shop. Personally, I don't think that either has helped me get many views or sales. I still maintain them, and I suppose it helps me be visible and get some interest outside of Etsy, but I think people who are new to Etsy are reluctant to buy on it. All my sales have been from people who are already active on Etsy. Every little bit helps though and who knows, I might get a sale from fb or twitter sometime!