Div (or span) tags are also nice since you could hide a certain area using some javascript.
Say the div tag looks like this: <div id=area1>...</div>
If you put this in the body of the page:
<script>
area1.style.display="none"
</script>
It won't display it. area1.style.visible="hidden" won't display it, but you'll see a gap where the text was.
Say the div tag looks like this: <div id=area1>...</div>
If you put this in the body of the page:
<script>
area1.style.display="none"
</script>
It won't display it. area1.style.visible="hidden" won't display it, but you'll see a gap where the text was.