Most engines assign varying degrees of importance to the location of your keywords on the page sorted by "Area".  These areas can only be seen when you view the HTML source code for a page. The area will have a begin tag such as <TITLE>, and an ending tag such as </TITLE>. The ending or closing tag will always have the added slash character in it. 

These Areas include:
Head
Title
META Keyword
META Description
Heading
Link Text
URL
ALT
Comment
Body