The Affiliate System (module "affiliates") lets you reward partners — existing customer accounts promoted to "affiliates" — with a commission on orders placed by the customers they bring in. It adds a Marketing > Affiliates menu with Affiliate Rules (/admin/affiliate/rules, commission plans) and Affiliate Users (/admin/affiliate/users), plus an Affiliates Report under Reports (/admin/stats/affiliates) where commissions are reviewed and paid. Affiliates get their own Affiliate Program section in the customer dashboard with Configuration (referral link, link generator, coupon details) and Reports (earnings) pages.