A few months ago, I was asking the very same question.  What the heck is 
Etsy?
Well, you have no doubt heard of eBay. 
Etsy is kind of like that.  Only it isn't.
Etsy is a selling venue (like eBay), but there the similarities pretty much begin and end.  
Etsy is an online marketplace for buying and selling all things handmade. 
Etsy lets you shop by color, place, time and material.
Etsy was launched on June 18, 2005.
Etsy is a store which sells 
arts and 
crafts and  
art supplies.  There is no bidding.  The seller sets a price and that is the price.  
I have been selling some things on eBay.  In fact I have used eBay for years.  So far I haven't found it to be terribly useful in selling art.  So I have decided to 1) give 
Etsy a try and 2) spread the word about 
Etsy.
My 
Etsy shops are 
Dolladay, in in which I feature a new doll every day and 
Ladyartichokeheart in which I feature other art, including art doll pins.
For those considering opening an 
Etsy shop, I highly recommend it.  It is easy to use and you have buyers who are interested in buying art!! 
For those who are considering shopping at 
Etsy, I highly recommend it.  It has an outrageous selection of arts and crafts and it is plenty of fun to just window shop!