The Great Commission is “the mission.”

Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all things that I have commanded you; and lo, I am with you always, even to the end of the age. Matthew 28:19-20

Acts 1:8 is the strategy of the Church “on mission”…

But you shall receive power when the Holy Spirit has come upon you; and you shall be witnesses to me in Jerusalem, and in all Judea and Samaria, and the ends of the earth.