The document discusses the evolution of digital marketing focusing on the importance of machine-readable data layers, specifically json-ld markup, in enhancing search engine optimization (SEO) amidst competition from platforms like Facebook. It outlines various benefits and applications of json-ld, including increasing organic click-through rates, improving remarketing efforts, and structured data automation tools. Additionally, it provides a detailed overview of technical implementations and examples of json-ld scripts for various content types to enable SEO optimization.