jailbreak

When a user wants to remove the security protections on a device to allow unauthorized installations. Not a great idea if you are concerned about security or have any interest at all in protecting your personal information.

Keep the iPhone updated to the latest iOS always and never Jailbreak. That's it.

iOS / iPadOS devices cannot be hacked or infected with Viruses / Malware / Spyware *** unless you have intentionally downloaded spurious software or unauthorized apps directly from the internet and installed them on your device, and/or have Jailbroken.