I have a business page with FB. I also have a Group page as well. On both, I announce new items, updates with pictures and so forth. While I am logged in as my business on FB, I look for other Etsy shops who are also on FB, and like them. I figure that if I "Like" them, they will go to my page and Like me back. I also check out the other pages that they like too, and so on and so on.
I sent out requests to all my family and friends to "Like" the page and asked them all to tell their friends about it as well. I've gotten a few who came and looked at my shop, but no sales yet. I know you can advertise with them, but it costs money (something I don't have right now).