A good question! What is a copper tongue scraper? Well, here is the infographic on 5 reasons why you need a copper tongue cleaner. Having your food taste better could be reason enough for adding this to your oral hygiene routine.
You won't be alone either as it has been practiced for around 5000 years and so you are in wise and good company.
It removes that milky film from your tongue. Not only is it nice to have a clean looking tongue, but it actually is cleaner. The reduction in bacteria and volatile sulfur compounds leads to fresher breath and improved taste.
See this page for how to use a copper tongue cleaner.