Clickbank and Cookies

Any anyone please shed some light on this topic?

My friend told me that the first cookie that gets placed on a persons computer gets the sale. So does that mean if someone went to the official website of the product, checked out my review page and then bought it from my affiliate link, the official website gets the sale?

I don't really understand cookies and cookie stuffing.

The last cookie get the sale, not the first. so if some one visits the site then purchase through your link you get the commission.

that's the beauty of clickbank...