HTML (HyperText Markup Language) is the standard markup language used to create and structure web pages. It defines the layout of a webpage using elements and tags[TBD], allowing for the display of text, images, links, and multimedia content. As the foundation of nearly all websites, HTML is used in over 95% of all web pages today, making it an essential part of modern web development. What about Remaining 5%: Non-traditional web content such as: PDFs opened directly in browsers Browser-based games using canvas/WebGL Embedded systems or kiosk interfaces Raw XML or plain-text responses Temporary or broken pages where no valid HTML is served. Experimental technologies or closed environments. [From chatgpt] All HTML documents must start with a document type declaration: <!DOCTYPE html>. [To Be Discussed] [TBD] The HTML document itself begins with and ends with . The visible part of the HTML document[TBD] is between and .…