Hi China I've been a Clickbank affiliate for a while now. The basic of how it works is, you sign up for a free affiliate account. You then have access to thousands of digital products that you can promote using a special affiliate link that you get when you choose to promote a product from within the marketplace area of the site. It is very easy to understand and navigate through. Commissions are paid out per sale depending on what the vendor has chosen the % of commissions to be. You will find that most vendors offer around 75% of the sale to you in commissions. I'm not sure how new you are to internet marketing or affiliate marketing as this is called. Giving me and the forum some further info on your background and experience so far would help us to answer your question further in depth.
China I'm not a moderator and I didn't click the link to clickbank before my last response. However I did go click it just now to see if you had made specific reference to something on clickbank that you wanted help with. I notice it immediately directs me to an affiliate offer. This as far as I am aware is strictly prohibited as it's false posting and trickery, they have proper names for it. Can't think of it off the top of my head. Anyways, if you're caught you'll likely be banned from the forums. Just a heads up.
One further note, you're affiliate link is not coded right as when I went through to the order form to check who the affiliate would be that got commissions, it says none at the bottom. So even if this did work for you in the forum, you won't make any commissions cause it's not set up right with your affiliate name in the link.