SEO stands for Search Engine Optimization, which is the process of improving the visibility of a website in the unpaid or organic search engine results. It involves various techniques and strategies to optimize a website's content, structure, and overall performance to make it more appealing to search engines. This helps the website to rank higher in search engine results pages (SERPs) and attract more organic traffic. SEO aims to increase the website's visibility, credibility, and relevance to specific search queries, ultimately driving more targeted traffic and potential customers to the website.