Add comments for user-friendliness
Revert "Add comments for user-friendliness"

This reverts commit 6daf87bbc8d887129119e7eacb4217dbdddbb6c0.
Revert "Revert "Add comments for user-friendliness""

This reverts commit f408e578ae99b77e4eb2dab56cc17efc19b88651.