Digital marketing encompasses the promotion of products and services through digital channels, primarily on the internet, as well as mobile devices and other digital mediums. It includes various methods such as search engine optimization (SEO), search engine marketing (SEM), social media optimization (SMO), and pay-per-click (PPC) advertising, all aimed at increasing online visibility and engagement. The evolution of digital marketing since the 1990s has led to more efficient campaigns and a shift from traditional marketing methods to leveraging digital advancements.