With the layout shown in the table above, you will see nothing. These are 'heading' tags. The text within each of these tags is displayed differently according to the browser. Therefore, you do not have much typographic control over how the text looks. Nevertheless, it must be noted that some search engines take these tags these tags more seriously.
Font face is the font in which the text is to be shown.
If the user does not have 'Arial' font, then the text will be shown in 'Courier' and so on. You should specify more than one font. CSS helps you to do this, but that's in another article. Put these tags around text to make it into a paragraph. There are more but they are slightly advanced.