Without an internet connection, your PS4 isn’t as exciting as it should be. Once and for all, without an internet connection, you won’t be able to use most of the console’s most important features, including multiplayer gaming, streaming video, and installing new games. If you are having trouble connecting your PS4 to the internet, this could be because the PlayStation Network may be offline, or there may be password issues with your Wi-Fi or console. It could also be possible that the router may not be connected or having larger connectivity issues, or there might be a need to change your DNS settings on your PlayStation. To troubleshoot such issues, you must check whether the PlayStation Network is online or determine if other devices can connect to the internet. You can check your PS4’s internet connection to the router or re-enter your Wi-Fi password as well.
Source: https://www.businessinsider.com/why-wont-my-ps4-connect-to-the-internet
