Missions, is bringing the Gospel of Jesus Christ to those who don't know Him as their Lord and Savior. It knows no limits in territory, people, places, or methods used to reach those who are lost. God’s desire is that none should perish.
God's call to each individual is unique and specific to them. God's will is for each individual to Love God and Love People, that's the 2 greatest of commandments as seen by Mathew 22:36-40. Now this love thing is expressed directly through the Great Commission, found in Matthew 28:18-20: "Therefore go and make disciples of all nations, baptizing them in the name of the Father, and the Son, and the Holy Spirit, teaching them to observe all that I commanded you; and surely I am with you always, even to the end of the age." God's command, to love Him and love others, drives us towards His commission to GO, make disciples, baptize, and teach, which is enabled by the Holy Spirit.