Um okay so can someone explain to me why validating your webpages is important? At http://validator.w3.org/ it also asks to validate your files. Why would you need to validate your files? What's the point of validating?

You may wish to take a look at this page. (http://validator.w3.org/docs/why.html)

Valid coding is not an absolute must, but it is a good idea. If you're going to do something, why not do it correctly?

Thank you! :)

You're welcome. :D