No seriously, she can. Your own grandmother can probably improve your website as well. Ok, she might not be able to get those 12.000 pages filled with scraped content out of supplemental hell, but she absolutely can help you improve your usability.
Have you ever watched your non web savvy friend, colleague or relative searching for stuff or navigating through a web shop? Almost every time I see an internet noob clicking on wrong links in a very unstructured way, I can barely suppress the feeling of saying ‘move over’ and doing it myself. In stead, I usually let them fool around and learn from their behaviour. Keep in mind that 99,9% of all people probably aren’t as web savvy as you are.
This is why your grandma (or every other person you know that isn’t either a Google AdWords Professional or a Stumble God) can help you to improve your website and -especially- your conversion rate. Let a non tech person find his or her way through your oh-so well designed conversion driven navigation path and see where he or she drops off.
Is it the ‘Buy now’ button that looks like a ‘Bugger off’ button if you happen to be a bit long-sighted? Are your breadcrumbs causing more frowning eyebrows than satisfied smiles? Or do most of your visitors feel that filling in your checkout registration form is like filling in their last will? Visit your grandma, bring your laptop and find out!