Every web page is made up of HTML code.
Tim Berners-Lee, the inventor of the World Wide Web, introduced HTML in the early nineties. Back then, HTML basically provided a way to structure documents into headers and paragraphs along with a linking mechanism. HTML's simplicity also aided the web's rapid growth. Since HTML was easy to learn, content could be provided by a rapidly growing number of HTML writers. Even though the initial version of HTML was good and simple, it was never intented for the demands of today.