Links that are placed higher on a page (hierarchy-wise) are considered to be more useful to the user and therefore most likely weighted more than links that appear lower down on a page. It is generally a good idea to get links from as high up in the HTML of a page as possible as these will most likely be weighted more than links found later down on a page.
Comments (2)
The article says that links higher in the heirachy are more valuable than links lower in the page. To me the heirachy is the depth of the link in the DOM, not its position in the source code.
You could have a link near the bottom of your source which is very high in the heirachy (directly under the <body> tag), or higher in the source code which is burried 30 elements deep.
Which does the article mean?
In this article I am talking about actual source code, but you bring up a good point. Do search engines take the DOM into account more than the source code? I wasn't aware that they were at this level yet.