Controls let you turn on and off all parental controls for your service.
With Parental Controls on, the kids can watch TV without you constantly
worrying they may see something inappropriate. With Controls off, adults
can watch their programs without repeatedly entering a password.

When Controls are on, titles of programs that exceed your parental control
settings will not be shown. Once Controls are turned off, all program titles
will be shown.

DTV Controls Guide (PDF)