The document discusses the evolution of websites from early static pages with one-way information flows to modern interactive websites enabled by Web 2.0 technologies. Early web pages were characterized by static content, HTML programming, slow connections, and limited interactivity through email and forums. Web 2.0 introduced complex programming languages, fast broadband, rich user interactivity through social media, and free web applications. Examples provided include sites like Wikipedia, YouTube, and Flickr that allow users to generate and share content.