This is one of the most important commandments in all of scripture. This is our mission, both individual and corporately, to seek to bring others into the kingdom of God.
Here is what Jesus said,
Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.
Matthew 28:19-20