The article discusses the concept of the Semantic Web, which is about making websites machine-readable, and how it has become widely adopted. The author explains how JSON-LD is used to add metadata to web pages, making it easier for search engines and other bots to understand the content. The article also touches on the idea that the Semantic Web is not a new concept, but rather a revival of an old idea that was previously known as Web 3.0. The author argues that the Semantic Web is already here and is being used by many websites, including social media platforms and search engines.