To join the TikTok affiliate marketing program, you need to meet some basic conditions. First of all, you must have an active personal TikTok account and comply with TikTok's community policies. Additionally, you need to create a TikTok Shop account and link your profile to your TikTok Shop account. Having a steady following and the ability to create creative, engaging content is also important for attracting potential customers and maximizing revenue from affiliate marketing.