Parental controls are an important tool that assist parents in managing their children’s video game use, even when parents aren’t around to supervise. These important tools are available for all current consoles, handhelds, smartphones and computers and they can be activated to block games by classification ratings. Certain device settings even allow parents to restrict access to the Internet, disable in-game purchases, regulate the amount of time your child can play and more.
The best tip though is to grab the controller or device and play the game with your child.
Follow these links to learn about the settings you can activate on each device.
Follow these links to learn how you can activate parental controls, depending on your particular concern. Please note it is a US based information service so the age ratings will be slightly different but your system should default to local age ratings.
https://www.esrb.org/tools-for-parents/parental-controls/