This Magento extension allows you to run SEO campaigns for FREE. Define keywords you need to push in search engines (Google, Yahoo!, Bing), make simple settings in Internal SEO Linking extension - enjoy improved search engine rankings and target traffic.
How it works?
You define keywords to target (not any keywords you would like to rank for, but the keyword you have a good chance to rank for. Probably you rank for it already and would like to climb a few positions higher). You know what page of your store is optimized for that keyword. You adjust settings for Internal SEO Linking extension in the admin and the extension automatically links the target keyword to the target URL of your store pumping link juice into that URL.
Notice: the extension does not do miracles. You should define and push those keywords that you have a good chance to rank for.