A PS4 system software update is required to use PSNSM features and some features on your system. Also, by updating the system software of your PS4 system, you can enjoy various additional features and enhanced security. Always update to the latest version.
With this minor required update, stability of system software has been improved. In addition, minor refinements to elements of the system UI (such as clearly indicating when a user downloads a game and a game patch at the same time) have been introduced.