Question

How are stars important to the Milky Way

Answer 1

Stars are a source of light and heat. They recycle all the matter, gas, and dust and process them into new material. They were created as a major driving force of evolution of the universe. 

Answer 2

Stars are the light and heat of the milky way the stars work with the milky way like the sun works with the earth the stars keep the milky way lit up and semi  warm like how the sun (which is a star of the milky way )  keeps the earth warm. Just remember that stars r just very big balls of gas burning in the sky :)