If your affiliate site has been penalized by Google, it’s likely because of thin content or over-optimization. Many affiliate sites focus too much on affiliate links and not enough on providing real value to visitors. Make sure your content is original, in-depth, and genuinely helpful to readers. Avoid spammy SEO practices like keyword stuffing or buying backlinks, as these can also lead to penalties. Regularly audit your site to ensure it meets Google’s quality guidelines and make necessary improvements to recover from or avoid penalties.