Nothing! Except your desire to be an affiliate.
You don't even need a website (although having your own website helps). You can promote our product via search engines (Learn how), postings in internet forums, tweeting, posting link on facebook, LinkedIn (Learn how), recording videos (Learn how), or simply email to all your friends and people you know with your affiliate link to our product. If you have own website, simply talk to your visitors in real time using live chat software on your website and send them your affiliate links through chat.
All you need to do is to send a visitor to our site via a special link (called 'affiliate link'), and if he or she buys anything from us, you will get 50% of the sale value.
Those are the results you can get.