Why Use Folders Instead of Multiple Domains - Google PageRank

Vanessa at SEL share a good example explaining why one should consider using folders instead of multiple web domains:

VF - If you want to rank for Viagra, why not create viagra.com, viagravideos.com, and viagrablog.com so you have more opportunities to rank? Nice try, but it doesn’t really work that way. For one thing, you’ll run into an issue with PageRank. If you have viagra.com, viagra.com/videos, and viagra.com/blog, then the two subdirectories may get some PageRank boost from links to the viagra.com home page. With three separate sites, you need to work three times as hard at getting links. And when link building, it’s hard enough to get a single link, much less three. Link.