Asanga, also known as Arya Asanga, was a renowned Buddhist philosopher and scholar who lived in the 4th century CE. He is credited as the founder of the Yogachara school of Buddhism, which had a significant impact on the spread of Buddhism in different regions.

One of the key ways in which Asanga's teachings impacted the spread of Buddhism was through his emphasis on the concept of Bodhisattva. According to Asanga, a Bodhisattva is an enlightened being who chooses to stay in the cycle of rebirth to help others achieve enlightenment. This concept of selfless service and compassion towards all beings resonated with people from different regions, leading to the widespread popularity of the Bodhisattva ideal and the practice of Mahayana Buddhism.

Asanga's teachings also had a significant impact on the development of Buddhist art and iconography. He is credited with the creation of the first image of the Buddha, which became a popular object of veneration and devotion in different regions. This helped in the spread of Buddhism as people were drawn to the beautiful and inspiring depictions of the Buddha and his teachings.

Furthermore, Asanga's teachings also played a crucial role in the development of Buddhist philosophy and psychology. He is known for his contributions to the Yogachara school, which focuses on the study of the mind and consciousness. Asanga's teachings on the nature of reality and the workings of the mind attracted many followers and scholars, leading to the spread of Yogachara Buddhism in different regions.

Another significant impact of Asanga's teachings was on the practice of meditation. He emphasized the importance of meditation as a means to achieve enlightenment and inner peace. This resonated with people from different regions who were seeking spiritual guidance and led to the spread of meditation practices in various forms of Buddhism.

Asanga's teachings also had a lasting impact on the spread of Buddhism in Tibet. He is believed to have had a vision of the Bodhisattva Maitreya, who became his spiritual guide and teacher. Asanga's teachings, along with those of his brother Vasubandhu, were instrumental in the development of Tibetan Buddhism, which continues to have a significant influence in the region.

In conclusion, Asanga's teachings had a profound impact on the spread of Buddhism in different regions. His emphasis on the Bodhisattva ideal, his contributions to Buddhist philosophy and psychology, and his teachings on meditation and spiritual practices continue to inspire and guide followers of Buddhism around the world.