The big news today was about Pegasus, the exploit targeting Apple devices. Pegasus exploits a vulnerability in iMessage, and can install itself on a device without a user doing anything to facilitate the installation. The spyware allows an attacker to steal messages, emails, and location data, and record with the camera and microphone.
Don't miss that you need to also separately upgrade your Apple Watch after you have updated your iPhone's operating system. Go to the Apple Watch app on the phone, and select General . . . Software Update.