Amazon SEO focuses on optimizing product listings to improve organic search rankings. It involves keyword research, optimizing product titles, descriptions, and images, and gathering reviews to enhance visibility. On the other hand, Amazon SEM uses paid ads to boost product visibility in search results. With Amazon Ads, businesses bid on keywords to place their products at the top of relevant searches. The combination of Amazon SEO and SEM helps drive both organic and paid traffic. By optimizing listings and running effective ad campaigns, sellers can increase their chances of appearing on the first page and driving more sales.