What Is HTML? HTML, which stands for Hypertext Markup Language, is the language used to describe structured documents and the language used to create web pages on the internet. You can use any text editor to write the HTML code, such as Notepad (PC) or TextEdit (Mac). For our demonstration, we will use a sublime text editor, which you can download at https://www.sublimetext.com/3 . Save the file with the .html extension, and open it using a web browser of your choice. What Is an HTML Tag? HTML tags are the keywords on a web page that define how your web browser must format and display your web page. Almost all tags contain two parts, an opening, and a closing tag. For example, <html> is the opening tag and </html> is the closing tag. Note that the closing tag has the same text as the opening tag, but has an additional forward-slash ( / ) character. There are a total of 100 HTML tags. We will divide them into categories and discuss the important ones i...