Warning! When using Store Code in URLs, in some cases system may not work properly if URLs without Store Codes are specified in the third party services (e.g. PayPal etc.).
I.e. redirect from http://example.com/store/ to http://www.example.com/store/
Warning! When using CDN, in some cases JavaScript may not run properly if CDN is not in your subdomain
Make sure that base URL ends with '/' (slash), e.g. http://yourdomain/magento/
Allows customers to stay logged in when switching between different stores.