How Hypertext Markup Language (HTML) Works
In order for a Web browser to display a Web page, its must be typed using HTML tags. All HTML files are marked with HTML tags. All headings, paragraphs, hyperlinks, etc. are marked with their own specific tags in order to be shown in a Web browser. Every HTML tag is surrounded by a less than and a greater than sign, for example, <p>. Tags always appear in pairs where the end tag has a slash in it to show that the command ends there.
For example, <p> My paragraph. </p>
The HTML document is the source page on any browser. This makes HTML compatible with any platform. Most Web browsers keep the basic structure of Web pages when they are displayed. However, pages may look different on different browsers, since the browser will determine the exact font, size, and colour displayed.