Although it won't be ready for its official release for a few more months, Apple has just dropped the first public beta for the upcoming iOS 12 update (read our hands-on impressions of the software here). Until September, anyone can help shape things up, as well as test-drive the latest OS build while various kinks are still ironed out.
Apple added several features and performance fixes to iOS 12. Do note iOS 12 public beta 1 is the same version as iOS 12 beta 2 for developers.
Once installed, iOS 12 will automatically update as new beta versions are released, but it is important to make sure you install the updates as they arrive, as bugs are fixed on a regular basis and older versions will no longer be supported.
You can get an overview of the other new features in tvOS 12 here.
Keep in mind that you should only install the public beta if you are comfortable with experiencing bugs in normal usage of your phone.
Before going insane and installing iOS 12 on all your devices, keep in mind that this is test software.
Again though, it's a beta, and you should proceed with caution.
How to download: To get started, head to beta.apple.com and get an early access account using the same information you use to sign into the App Store. You'll then have to sign in with your Apple ID login. You can see the full list of changes from ZDNet's round up here.
Nowhere near as drastic a redesign as last year's iOS 11, the twelfth edition of Apple's popular mobile platform is primarily focused on improving your iPhone and iPad's system stability, speed and "digital health". Reboot your device, then head over to the Settings app.