Clearance items are not going to be replenished after the items are sold out. They will receive more stock of sale items.

Clearance is when for example clothes are out of season & they need to get rid of it

Sale is cut in price

At some shopping sites they have both Sale and Clearance section. I just wanna know what the different is and which one is better price. Anyone knows? Thanks!

What difference, It is all eye wash to get you to come in and spend money. Believe me they are not taking a loss on anything.