Say what, Willis? A .htaccess file is a file stored on your server that can redirect URL’s. For example, I have mrtechnique.com redirected to www.mrtechnique.com. Google treats these two URL’s as different pages with duplicate content, and they frown on websites with duplicate content.
If you get a new website designed with different page names or even a completely different URL, you can also use your .htaccess file to redirect your old URL’s to the new URL’s.