According to Ayurveda, the tongue is the mirror to all the organs of the body and by scraping the tongue first thing in the morning, the function of the organs are stimulated.

Scraping the tongue daily with a copper tongue scraper which is anti-bacterial in nature, removes any build-up on the tongue, known as ama. A coating on the tongue indicates an accumulation of toxic residue in the mind-body. This can result from improper eating such as heavy, late night meals, poor digestion, or a reflection of an imbalance somewhere in the gastrointestinal system.

If not removed, it can lead to not only bad breath (halitosis) but a re-ingestion of metabolic sludge into the system causing further imbalance.  By removing this coating you can also improve your ability to taste your food.