In this part you will know that what Affiliate program is but what is the key how to success in this program ?
Let see some of the articles who written about how to success in Affiliate Program;
1. Written by Koka Sexton,
Resource: http://www.kokasexton.com/word/03/keys-to-success-in-affiliate-marketing/
One of the secrets to being an online success is being organized and disciplined. Even if you are the smartest person on the planet but cannot sit down and do a single day’s work, then it really would not matter in the least. There are many people with high IQ who have not gotten anywhere with their lives and all because they lacked the necessary discipline and organizational skills to do anything much about it. Take my mother for example, she was a brilliant pianist and a great opera singer and as a result of her poor organizational skills, her career pretty much met a dead end. That really sucks for me but then again, that is the truth.
The key to online success is to start creating your own products or services .One can make money online as an affiliate marketer by promoting the products of others. But remember, you would be competing with hundreds of other affiliate marketers who will be selling the same product. By creating your own products you would not only eliminate the need to compete with other affiliate marketers but you can also use them to promote your product for you. Having done this, I ended up quadrupling my income within a year.
One of the key factors to any online success is advertising. Your site may well be the greatest one but if no one knows about it, then you will find it difficult to make even a dime off it. I am not going to give an explanation as how setting up an online site without any promotion is useless. I shall save that for a later article. But the point being that until and unless you utilize the proven methods for promotion, the chance of you succeeding is minimal, to say the least.
Finally there’s communication or rather, writing. This is one important tool, one that we all use at all levels of our business. From the sales pages to the page contents, from the auto responder emails to responding to customer inquiries, they all have to do with writing in one form or the other. If you cannot communicate effectively then the chances of you capturing the attention of your target market is slim. You can always outsource such ‘writing’ tasks, but they will prove to be expensive.
These are my 4 keys to success. There may be many others but these are the ones that really deliver as far as I’m concerned.

2. Written by Arlin Audrain,
Resource: http://ezinearticles.com/?The-Two-Keys-to-Success-With-Affiliate-Marketing&id=2363810

Obviously the two keys to your success with affiliate marketing are Traffic and Conversions.
Traffic is the number one key.
Getting people to your affiliate website is everything. If people never see your affiliates website, then they cannot buy the product you are promoting. There are people "out there" who will buy. You simply must find them. That is your role as an affiliate marketer. That is the key to your success as an affiliate marketer.
The following are the most used methods for generating traffic to your affiliate sites. In later articles we will go into more depth on each: Use paid advertisements - either paid ads or pay per click such as AdWords Use free ads like US Free Ads. Write and post articles about your product. Join and post in forums that cater to your specific niche. Search Engine Optimization- Use good keywords, tags, and back links to get good placement with search engines.
When you get to the point that you have a lot of traffic, you have won half the battle with affiliate marketing.
Now you must look at key number two: conversions.
Are you making any sales to your traffic? If a few of your visitors are purchasing, you can assume that your advertising is probably targeted to the right people. Your next move is to tweak your sales page until it converts more of your traffic into buyers. You may have to make several changes before you see maximum conversions.
You may need to make changes to the physical look of your page including color, graphics, font size and color. Or you may need to relocate you opt in box on the page, or even add another box. A good idea is to visit the pages of successful campaigners and copy their style. Just keep your content original. It is vitally important to track your stats so you can see the results of each tweak.
If, on the other hand, you have lots of traffic but no conversions, you may be targeting the wrong group of people. You may have to tweak or change your ads to target a different kind of person. You need to target people who are looking for your product. For every product, there is an ideal marketplace- (people who want that product). To be a successful affiliate marketer, you must bring the two together.
To recap, place your advertisement in front of the people who are specifically looking for or needing our product. As you begin to receive traffic, tweak your sales approach until you are converting a maximum amount of traffic to buyers. Get traffic. Convert the traffic.
For more tips and free help with keys to success with Affiliate Marketing, hop over to http://www.internetmarketingsuccesssite.com.
Now I hope that you will get some idea how to success and I'm glad to share this knowledge to you all and apply to your own style then let's make better life from Affiliate program.