HTML means HyperText Markup Language. It was developed in the 1990 by Mr. Timothy Berners-Lee. It is the code that allows us to make web pages to share with others on the World Wide Web (WWW)
As you can see the HTML consists of "tags" around certain parts of the text to tell the computer browser how to display it
Listed below are a lot of different tags to make your pages with. Experiment with them in the HTML Sandbox