출처(Original Post) : http://webdesign.about.com/od/htmltags/a/aa011000a.htm
The primary difference between the <span> and <div> tags is that <span> doesn’t do any formatting of it’s own. The <div> tag acts includes a paragraph break, because it is defining a logical division in the document. The <span> tag simply tells the browser to apply the style rules to whatever is within the <span>.
<div>Without br tag, next word is newline</div>Test<br>
<span>Next word is on the same line</span>Test<br>
Browser Viewing :
Next word is on the same lineTest