"Masala" is any of a variety of culinary spice mixtures used in Indian cuisine. "Chai" means tea! In America, we have shortened the name to simply "chai." What we're referencing is a tea base flavored with cinnamon, ginger, cardamom, cloves, and other sweet spices.
Ginger may be soothing for the stomach
Antioxidants in tea leaves strengthen the cardiovascular system