Item number from bottom of box

j.hermit · 2013-10-26T21:27:28.000Z

This is my first post on Brickpicker (hurray!), I've been lurking for a little while now. My question: does anyone know what the item number listed on the bottom of the box is used for? For example, Uruk-Hai Army set #9471 lists "Item: 4653953" above the UPC code. I'm listing a few sets on Ebay and I'm wondering if this number is important or should be included somewhere. Any replies appreciated, and thanks to everyone for such an awesome site; you've already provided me with tons of useful info.