If you want something to show up in bold on a Web page, you would use the bold tag. For example, the line:
This site is the <b>best website</b> ever!
would show up as: This site is the best website ever!
Since there is often a need to format content within more general tags, the tags can be "nested," meaning one tag can enclose one or more other tags. For example:
<font="Times">This is the Times font, and <i>this is in italics</i>. Pretty exciting, huh?</font>
would should up as: This is the Times font, and this is in italics. Pretty exciting, huh?
Tags are a fundemental part of HTML and they are pretty simple to understand. If you want to build a Web site of your own, you can either create it from scratch (using a text editor and typing your own tags) or you can use a layout program like Macromedia Dreamweaver, which will generate the tags for you. Best of all, tags used in markup languages don't itch or chafe your neck.