Google defines PageRank as the “importance of a website page”.  It is passed from one website page to another through backlinks.  More backlinks typically translates into higher PageRank values.

In most cases, the home page of a website has the highest PageRank value.  This means the home page has the greatest optimization potential (assuming all other ranking factors are equal).

1st level interior pages, that have direct links from the home page, typically have slightly lower PageRank values.  PageRank values decline for deeper interior pages.  Lower PageRank values typically mean lower ranking potential.

E-commerce store pages that are deep within a website often have very low PageRank values.  For this reason alone, they are poor candidates for all but the weakest competitive keywords.

Read more about PageRank Optimization here.

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