Hello, everybody! This is my first post... what a great website, and an incredible wealth of information. I am a newbie here, and I am finally starting to catch on to the basics of SEO and AdSense. My question is this: For the sake of SEO and appearing high on search engine rankings, is a domain name actually necessary? I have a .com website that is a collection of different articles about various health related topics. Each different section is basically a different website, but is there a significant difference between, for example: http://www.thisisjustanexample.com/depression and then, let's say, a different section for drug addiction: http://www.thisisjustanexample.com/drug_addiction versus http://www.depressionsolutionsforeverbody.info http://www.drugaddictionsolutionsforeverybody.info Hopefully my question makes sense -- what I'm trying to say is, do I need a separate domain name for each and every topic? Thanks for your advice!