It categorizes the HTML tags to help you understand the way an HTML document is coded. All markups are not necessarily available to every user because they use different browsers and browser versions. You can't have everything. For certain tags I've noted HTML 3, otherwise the tags should work with browsers that read HTML 2. Main Document Tags Think of these tags as signposts for software programs that want to find things in and about your document.
Paragraphs are simple.
The paragraphs will conform in width to the width of the user's screen or width the browser is set at. The only reason I can see for using this tag is to create the indented paragraph, otherwise you could use good old quotation marks to indicate a quote. Good for centering major headings, a paragraph that you want to stand out, a table or image you want to appear as centered, and any other visual element you want in the center of the page. Lists by bullet , number and indentation come in a wide variety. Images are placed with specific tags that require detailed explanation.