What is Affiliate program?
A program defines what you are paid for, how much, which countries and traffic sources are accepted, and when payments are made.
Programs can be run in-house (the brand handles sign-ups, tracking and payments itself) or listed on one or more affiliate networks. Many brands do both.
Before joining, check the payout model, the cookie window, the hold period and the minimum payout. These four details decide how much and how fast you actually earn.