Nothing! Except for your desire to be an affiliate.
You don't even need a website (although having your own website helps). You can promote our products through Facebook, Instagram, Twitter or simply email to all your friends and people you know with your referral link/coupon code to our products.
All you need to do is to share the link/coupon code prepared for you on your postings, and if your followers/friends/family buys any of our products using your referral link/coupon code, you will get paid.