This week, Rand explains the two ways to think about Link Juice flow.
As a conduit between pages
As a leak from one page into another
It can be helpful to think of link to other sites on the web as a conduit, and a leak between pages on your site. Link when it is valuable to your visitors.
Webmasters can control the flow by using “nofollow” and other methods. Nofollow will stop a page passing Link Juice to the page it’s being linked to.
For advanced SEO, controlling link juice can…
Get more pages indexed
Provide marginal extra ranking ability
Keep juice from ranking ‘useless’ pages