Setting Restrictions on PS4

All PlayStation 4 games are rated by the Entertainment Software Rating Board (ESRB) to help parents understand the content in a game. Applications such as Netflix or Hulu do not go through the same process but have age ratings associated with them as well. You can use these ratings in conjunction with the PS4's parental controls to restrict access to minors.

To change the parental control level for games and applications, make sure you are logged in to the Sub Account you'd like to restrict. If you're logged in to the Master Account, simply press and hold the PS button on the controller, log out of the Master Account, and log in to the Sub Account.

From the PS4's Home Screen, press up on the d-pad to get to the Function area.

Go to (Settings) > [Parental Controls] > [Restrict Use of PS4 Features] > [Application] and choose the level you'd like to set. Once these levels are set, sub account users who have been restricted will see a padlock icon in place of the normal artwork for the game or app.

"Allow" means that there are no restrictions. After that there are 11 different levels available. 11 is the least restrictive and 1 is the most restrictive. The ESRB ratings that coincide with each parental control level are:

Early Childhood: (Level2) Content is intended for young children.
Everyone: (Level 3) Content is generally suitable for all ages. May contain minimal cartoon, fantasy or mild violence and/or infrequent use of mild language.
Everyone 10+: (Level 4)
Teen: (Level 5)
Mature: (Level 9)