There is a lot of talk about Google Page Rank, but not everyone knows the whole story about it and this could mean trouble for your websites position within the Google search system.
Therefore, it stands to reason that knowing as much as you can about the Page Rank system will help your site get more visitors and as more people see your site they tell others and so on.
However, the key to Page Rank is to get other similar sites to like yours and link to your site, this is how your Page Rank increases. It is explained more in this cool graphic from Killer Infographics, it was very popular when it first appeared so it must have something good in there.
Source [Killer Infographics]