Link Popularity in the Site's Internal Link Structure

The fact is that some of your web pages will get more external links than others. Those that do not get a lot of external links could be the actual money pages that you would wish to rank well in the SE indexes.

The internal linking structure, in addition to the anchor text employed in the internal links, is the way to disperse PageRank inside your own site.

Some search engine optimization professionals say that an internal link to a page has the same value as a link from an external page. That doesn't mean the site will rank with nothing more than internal links. What it means is that you could cause a page to be ranked by having internal links pointing to it even though it does not have lots of external links, on the condition that the remainder of the web site has acquired enough trust from external links.