This basically means that the SELLER promises that the product will do what it is supposed to do. For example, a car will run and a toaster will toast. Most sellers have a 30 or 60 day return policy. RC Willey limits theirs to 14 days. That is really short. For instance, lets say you purchased a t.v. as a present for Christmas. By the time Christmas rolls around and you get the TV set up, it can easily be past 14 days. If there is a problem with the T.V., getting Samsung or Sony or LG to address the problem takes time and is a big pain in the rear. Often times it involves you taking the item to a repair shop, OR arranging for it to be delivered.
If an item breaks after this time but before the manufacturers warranty expires, most Sellers will assist a customer in obtaining assistance from the Manufacturer. RC Willey is frankly a bit infamous in NOT being helpful to customers after the sale.