It's not easy being green! Well - that may not be exactly true for matcha.
Matcha is a finely ground powder of specially grown and processed green tea. The translation literally means "powdered tea." If you are a tea drinker, you most likely use a tea bag, infuse your hot water for a few minutes, then remove the tea bag from the water. The contents remain in the tea bag (or the most part) the entire process.
With matcha, you are actually consuming the tea itself; the powdered leaves are put directly into the water for infusion. Traditionally, matcha is used in the Japanese tea ceremony, not loose green tea.
So - why drink matcha in the first place?