The best TikTok challenges for affiliate promotions are those that are fun, simple to join, and linked to a product or idea that people already enjoy using or want to try. If you are promoting a beauty product, you can start a challenge that shows before and after results using the product. For fitness, a short workout challenge with a hashtag and product tag can do well. Challenges that are based on transformation, humor, or quick wins usually get more attention. Make sure the challenge idea gives others something to copy or build on. This makes it easy for more people to participate and helps your message spread. You can also work with other users who already have followers to help the challenge grow faster. What kinds of TikTok challenges do you think would grab the most attention for a product?