Social proof is a marketing idea that shows other people already trust or use a product. When readers see that many people like a product, it can make them feel more confident about it. In affiliate content this can be added by showing customer reviews, ratings, or simple comments from users who have tried the product. For example, a blog post can mention that thousands of users use a tool daily or that many reviews praise its results. These small details help readers feel less unsure about the product. Do you think social proof really affects buying decisions online?