Why you need a ‘www.’

In the early days of the internet, we named our world wide webservers ‘www’ to distinguish them from, say, our ftp and gopher servers. Since then, the web has become the main way most people interact with the Internet, and it has started to become fashionable to omit the ‘www.’ Sites like twitter.com and medium.com are making a statement about the modern web, and many people feel that ‘www’ on a web site is old-fashioned and redundant.

However, for a couple of technological reasons that cropped up during the development of the web, serving your website from ‘www’ is still advisable. If you choose to serve your site from a bare domain like twitter.com, it will be harder to deal with XSS and you may be subject to cookie stealing.

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