Search Engine Optimization (SEO) is the practice of enhancing a website or online content to improve its visibility and ranking on search engine results pages (SERPs). The goal of SEO is to attract organic (non-paid) traffic by optimizing various elements such as keywords, site structure, content quality, and user experience. This involves both on-page factors, like meta tags and content relevance, and off-page factors, such as backlinks and social media presence. Effective SEO aims to increase the likelihood that a website appears higher in search results when users query relevant terms, thereby driving more targeted visitors to the site.