The key difference between SEM and SEO is SEM focuses on paid ads to drive traffic, while SEO involves optimizing a website to increase organic search traffic. En el mundo del SEO podemos distinguir diferentes "escuelas", pero que hay muchas técnicas posibles para mejorar el posicionamiento de una web. https://bookmarksden.com/story17852755/fascinaci%C3%B3n-acerca-de-marketing-engine-search-strategy