SEO, or Search Engine Optimization, plays a crucial role in website development by enhancing the visibility of a website in search engine results pages (SERPs). Through techniques like keyword optimization, meta tags, and quality content creation, SEO ensures that a website attracts relevant traffic. Improved SEO not only increases organic reach but also enhances user experience, which further contributes to higher conversion rates. Ultimately, integrating SEO into the development process is essential for achieving online marketing goals.