Search Engine Relationship Chart

This looks cool. Can someone explain what to do with the information?

http://www.bruceclay.com/searchenginerelationshipchart.htm

 

optimize for google then yahoo and try to get your site listed in dmoz

 

is there a difference in optimizing between the two?

 

It shows the relationships between search engines, for instance set your mouse to alltheweb, this search engine recieves primary search results and paid results from yahoo search engine. Handy tool.

 

here is a great article about the differences between the SEs: http://www.seobook.com/relevancy/