It seems that Sony has rolled out another system update for your PS4. However, it’s not that much though. The latest 4.74 update is only going to improve the quality of your PS4’s performance – much like the 4.73 update.
“Improves the quality of the system performance”
The update is at around 340MB. It should automatically download to your PS4 if you’re connected through the internet.
As we wait for the big update soon, the last one was the 4.50 which added the Boost Mode for the PS4 Pro and also adding external hard drive support.