What measure did Ashoka take to spread Buddhism?

Emperor Ashoka, also known as Ashoka the Great, was a leader of the Mauryan dynasty and ruled most of what is now modern-day India. Conflict was a way of life for most people of the world at that time, and it was no different in ancient India. Eight years into his reign Ashoka waged war against the kingdom of Kalinga. Eventually, after a long and bitter struggle, Kalinga was conquered, a feat which none of Ashoka's ancestors had managed to achieve. But Ashoka's victory came at a terrible human cost. Even by the standards of the day, the devastation caused by the war was massive, with hundreds of thousands of people perishing in the savage conflict. Legend has it that Ashoka was so shocked by the sheer scale of the carnage that he renounced violence and became a Buddhist.
Whatever the reasons behind Ashoka's conversion, there is little doubt that he was sincere in his newfound religious convictions. He subsequently set about promoting Buddhism, not just in India, but also throughout the wider world. He built numerous shrines and monasteries; he sent missionaries to far-off places such as Greece and Egypt; his son Mahinda became a Buddhist monk and spread the religion to Sri Lanka, where it still remains the dominant religion to this day.
Ashoka remained remarkably respectful and tolerant of other religions. His policy of tolerance greatly strengthened his kingdom, leading to growing political stability and economic prosperity.
https://www.britannica.com/biography/Ashoka