SEO ranking refers to the position of a website or webpage in the search engine results pages (SERPs) for a specific keyword or phrase. It is a measure of how well a website is optimized for search engines and how relevant and authoritative it is in relation to other websites. A higher SEO ranking means that a website is more likely to appear at the top of the search results, increasing its visibility and potential for organic traffic. SEO ranking is influenced by various factors such as quality of content, backlinks, and technical optimization, and is constantly changing due to search engine algorithms and competition.