Search Engine Optimization (SEO) encompasses all activities aimed at improving a website's visibility in the unpaid results of search engines, thereby generating more visitors.
SEO is fundamental to making websites visible for relevant search terms, generating quality traffic, and optimizing user experience. This includes on-page optimization, off-page optimization, keyword optimization, technical optimization, and more. Well-executed SEO not only improves a website's ranking but also enhances user experience and the credibility of a site.