SEO stands for Search Engine Optimization, which refers to the process of improving the quality and quantity of traffic to a website from search engines through organic search results. SEO involves optimizing a website's content, structure, and technical aspects to make it more visible and relevant to search engines and users. The goal of SEO is to improve a website's ranking on search engine results pages (SERPs) for specific keywords and phrases, which in turn can lead to increased traffic, leads, and revenue for a business.