It’s a Chinese belief system based on living through harmony and simplicity. It usually means “going with the flow” and being chill while respecting nature and living beings.

“Taoism or Daoism (/ˈtaʊɪzəm/ ⓘ or /ˈdaʊɪzəm/ ⓘ) is a diverse tradition indigenous to China, variously characterized as both a philosophy and a religion. Taoism emphasizes living in harmony with what is known as the Tao—generally understood as being the impersonal, enigmatic process of transformation ultimately underlying reality.” - Wikipedia