Apple has released updates for iOS, iPadOS, watchOS, and macOS. The updates contain security patches, while iOS and iPadOS also has a fix for an issue with App Tracking Transparency.
The Webkit fix is especially important. Apple’s security update document states that it fixes a flaw where, Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited. Two phrases you never want to hear in a security update are arbitrary code execution and may have been actively exploited, so it’s important that users update as soon as possible.
Before updating, it’s a good idea to back up your data, just in case the update causes problems. To install the update, you need an internet connection. Also, your device will need to restart in order to finish the installation. Here are the steps.