Search Engine Optimization (SEO) is a requirement for any affiliate marketer looking to earn traffic from search engines organically. By keyword-optimizing meta descriptions, backlinks, and content, affiliate sites can be positioned higher on search engines, translating to more conversions and clicks. SEO also enhances user experience such that visitors tend to stay longer and believe the recommendations. Content that is information-rich and aligned with user intent will naturally perform better in conversion. Even without a big budget, using free SEO tools can significantly boost the visibility of a site. Networks like vCommission provide well-optimized campaigns to allow affiliates to optimize their SEO planning on the basis of highly converting offers appropriately.