We can say that HTML is the backbone of all web pages and so a pillar of the internet. Its meaning, "Hypertext Markup Language", won't say much to many people. So what is it really, how could it be best described? If a webpage were a human body, HTML would be the skeleton inside of it. It is the structure that defines all parts of a page: the header, body, footer, paragraphs, and sentences. In the very beginning, websites were written in HTML only.