The document discusses the history and future of the World Wide Web. It explains that the web was created by allowing webpages to link to one another through HTML tags like <a>. Over time, additional tags were introduced that enabled embedding images, videos, and other media within webpages using tags such as <img> and <video>, allowing users to view this content without leaving the page. Looking ahead, the document suggests that websites may develop their own custom tags in the future to make embedding content even simpler.