Buddhist schools refer to the various traditions and interpretations of Buddhism that have developed over time. The main branches include Theravada, which emphasizes individual enlightenment and the teachings of the historical Buddha, and Mahayana, which focuses on the collective salvation of all beings and includes various sub-schools like Zen and Pure Land. Each school has its own practices, texts, and philosophies. For example, Zen Buddhism emphasizes meditation and direct experience, while Pure Land Buddhism focuses on devotion to the Amitabha Buddha for rebirth in a blissful realm. These differences reflect the diverse ways in which people seek spiritual understanding and enlightenment.