What is affiliate marketing
Simply put, affiliate marketing to promote other people's products. If you know someone else's product successfully promotes and ensures that the consumer buys the product through your website, you get a percentage commission for this. So you have no own product, but you promote the products of others.
This is done by a special affiliate link to place on your website. This then links to the product you're promoting. By using a special affiliate link, the visitor can be precisely measured is through your website, and so you will get commissions when consumers buy the product.
You're like a middleman!
These products can be anything. It may be (mobile) phones, concert tickets, shoes or even applications for a contest.
To measure where the visitor comes from (your website, the website of the product you promote) you have to have a special affiliate link. This is a link containing your personal code. There are several services that you can do that.
You must sign up for that with an affiliate network. These affiliate networks make it possible to create a special affiliate link without you there any technical knowledge needed. Personally, I recommend to use Daisycon as an affiliate network. This system I find it easiest to work, and the service is really very good.