| ArticleSummary = Did you know that if you own www.mywebsite.com, you also own blog.mywebsite.com, store.mywebsite.com and anythingelse.mywebsite.com? Each of these is a subdomain of mywebsite.com. You might think – and many web designers do think – that subdomains are a nice way to organize your website. People often put the company blog on blog.mywebsite.com, the product catalog and shopping cart on store.mywebsite.com, and job listings on career.mywebsite.com. While this seems like a reasonable way to structure a website, it's a real problem for search engine optimization.