Although these tags may be used to change the appearance of the text (using EM to make it italic, STRONG to make it bold, and SMALL to make it smaller), that is not their major function, and you shouldn't use them only to make your writing seem a certain way. These tags provide a distinctive design impact not found in others (). Here are the functions of these tags:  tag: For marking up any emphasized text.  tag: Mostly used in headings, titles, as well as paragraphs to put stress over the word of greatest importance.  tag: It is commonly used for side comments, disclaimers, clarifications, etc.