Dalai Lama is a title given by the Tibetan people to the foremost spiritual leader of the Gelug or ‘Yellow Hat’ school of Tibetan Buddhism, the newest of the classical schools of Tibetan Buddhism. The 14th and current Dalai Lama is Tenzin Gyatso, who lives as a refugee in India. The Dalai Lama is also considered to be the successor in a line of tulkus who are believed to be incarnations of Avalokiteśvara, a Bodhisattva of Compassion.
-Wikipedia