iOS and iPadOS 14.4.2 for all current iPhones and iPads do not bring new features, but only one important change in the security system. The update closes a vulnerability actively exploited by hackers.
This is a vulnerability that allowed malicious code to be injected into smartphones through infected sites. How exactly this works and how many devices were jailbroken are not specified.
If the device has not yet offered to install the update, you need to go to “Settings”, → “General”, → “Software update”. In this menu, you will be prompted to install iOS 14.4.2, and the iPad is also updated.