M.R.
I vote you google it...here's a site with the benefits written in a succinct fashion:
http://www.lifehack.org/articles/lifestyle/11-benefits-of...
Personally, I drink green tea every day, but I mix it in with my black tea in the morning. I only drink green tea straight while having sushi. Otherwise, I'm not fond of the flavor.
I just had a Dermatology check up and the Dermatologist was surprised at the condition of my skin, as I grew up in SoCalif using baby oil at the beach and then lived for several years in Phoenix, AZ. She was expecting all sorts of cantankerous and cancerous looking spots on me. She did not find even one suspicious freckle.
I would attribute my healthy skin to drinking green tea and not to my sun habits.
HTH!