It is necessary to open up a text editor application and a browser application. While you create your document in the text editor you will also open your file in the browser. Markup Language is a system of codes that identifies parts of a document such as headings, lists, paragraphs, etc. These codes are called tags .
Tags tell a web browser how to display the text.
There are 4 HTML tags that you must use in every HTML document that you design. Each heading is created by using unique HTML heading tags. Top Unordered Lists Unordered lists produce a bulleted list. There are several ways to emphasize text. An external link takes you to a web site that is outside of the present web site.