He asked those individuals to pass on Holy Salt to members throughout the world. All things of the environment were created for human beings. Adam and Eve needed a pure environment. Due to the fall, everything was lost and came under Satan. However, God's salvation process focused first on restoring humankind.
True Parents are the first true couple in all of history.
Until the True Parents were completely installed, God could never concentrate on restoring all things. According to the Principle, True Parents are the perfected ideal man and woman and the first God-centered ancestors of humankind. Just as Adam and Eve, they need an ideal environment. After True Parents' Holy Blessing, the environment was not yet ideal. In order to purify the environment and all things, therefore, True Father created Holy Salt.