Facebook has begun testing their rumored Want button with a bunch of online retailers including Pottery Barn.
The feature as the name suggest is designed to be used with products. The idea is to let the user click it on products that he wants to purchase.
User also get a chance to describe why he is interested in that product.
Facebook could use the data generated from this button to send personalized ads with discounted deals in the future.
Right now, it is going through a test before it is made available widely.