HTML stands for HyperText Markup Language. Developed by scientist Tim Berners-Lee in 1990, HTML is the "hidden" code that helps us communicate with others on the World Wide Web (WWW).
When writing HTML, you add "tags" to the text in order to create the structure. These tags tell the browser how to display the text or graphics in the document. For example, the following document has a simple layout (structure). Notice there are three major parts: a heading, two paragraphs and a bulleted list.