SEO (Search Engine Optimization) is the process of improving a website or blog so that it ranks higher on search engines like Google. The main goal of SEO is to increase organic (free) traffic by making content more useful, relevant, and easy to find. It involves using the right keywords, creating high-quality content, optimizing website speed and structure, and building backlinks from other websites. When SEO is done correctly, a website appears higher in search results, which leads to more visitors, better engagement, and overall growth.