Search Engine Optimization (SEO) is the practice of improving a website's visibility on search engines like Google. By optimizing various elements of a website, such as content, keywords, and structure, businesses aim to rank higher in search results. This can lead to increased traffic and potential customers. SEO involves both on-page and off-page techniques. On-page SEO focuses on optimizing content and HTML tags, while off-page SEO includes building backlinks from other websites. Together, these strategies help search engines understand the relevance and quality of a site, ultimately influencing its ranking in search results.