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This is one querstion I've been thinking about for a while: where is the best location for a blog on your website for SEO purposes? In this case I'm thinking the blog as part of a commerical website. Sub domain: You could put it on a subdomain such as blog.mydomain.com which seems quite popular (blog.kissmetrics for example) but surely this is giving the blog.mydomain sub domain the SEO value and not the www.mydomain sub domain. The one value I see here is that you could host this on another server and so any links to my main website would be from a different IP address. You could also point the sub domain to a WordPress.com blog. Internal: There are two ways the blog could be run internal to the website: 1) if the website is a WordPress.org installation you could just use one category as the blog or 2) a fresh WordPress.org installation in a sub folder such as www.mydomain.com/blog. The benefits I see with #2 is that any guest posters would only have access to the blog and not the main company website and you could make the look and feel of the blog to be more "bloggy" than the main commerical website. External: TBH I don't think there is any benefit to running a blog completely external to the commerical website (such as a WordPress.com blog) unless the company provides online services so that if the main website goes down, the blog will still be running. So, from the above, which is the best way to run a commerical site blog? Or have I missed some other options?