Chaitanya Mahaprabhu, also known as Sri Krishna Chaitanya, was a 16th-century Indian saint and social reformer who is considered the founder of Gaudiya Vaishnavism. He was a devout follower of Lord Krishna and his teachings emphasized the path of bhakti (devotion) as the means to attain spiritual liberation.

Chaitanya Mahaprabhu's mission was to spread the message of love and devotion to Lord Krishna throughout India. He traveled extensively, visiting various holy sites and engaging in spiritual discussions with scholars and devotees. His teachings were not limited to any particular caste or religion, and he welcomed people from all walks of life to join in the practice of bhakti.

One of the key ways in which Chaitanya Mahaprabhu spread the teachings of Gaudiya Vaishnavism was through his kirtans (devotional songs) and sankirtans (group chanting of the holy names of Krishna). He believed that the sound vibration of the holy names had the power to purify the heart and bring one closer to God. He would often lead large groups of people in these devotional activities, creating a sense of community and unity among his followers.

Chaitanya Mahaprabhu also established the practice of Nama-Sankirtan, which involved the constant chanting of the holy names of Krishna as a means of attaining spiritual enlightenment. He encouraged his followers to chant the Hare Krishna mantra - "Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare, Hare Rama, Hare Rama, Rama Rama, Hare Hare" - as a means of connecting with God.

In addition to spreading the teachings through his own actions, Chaitanya Mahaprabhu also trained and empowered his disciples to carry on his mission. He established a system of disciplic succession, where his teachings were passed down from guru to disciple, ensuring the continued spread of Gaudiya Vaishnavism.

Chaitanya Mahaprabhu also wrote several devotional texts, including the Siksastakam and the Chaitanya Charitamrita, which serve as important scriptures for Gaudiya Vaishnavas. These texts contain the essence of his teachings and serve as a guide for his followers.

Through his teachings and actions, Chaitanya Mahaprabhu was able to attract a large following and establish a strong foundation for the spread of Gaudiya Vaishnavism. His message of love and devotion to God continues to inspire people around the world, and his legacy lives on through the millions of followers who continue to practice and spread his teachings.