The new IOS 12.0.0 just came out along with 12.0.1. 12.0.0 would be an Upgrade. 12.0.1 would be and Update.
Upgrading to a new iOS® on your iPad® and iPhone® is always a good thing. I usually wait a week or two before I do it, so I can have other people upgrade and tell me if they like it.
I dislike having to change to the new iOS® on mobile devices, but it is good to do to make sure everything works well. Your iPhone® and iPad® will thank you for the updates and upgrades and will run smoother.
If you find problems with your iPhone® or iPad® after an upgrade, try a soft reset. This usually takes care of most problems.
All upgrades and updates are designed to make your life easier and protected.
We always recommend doing a backup before you upgrade to a new iOS.
Updating your current iOS is always a great thing to do. All it does is fix problems, or bugs. Always do this.