https://www.cnet.com/news/samsung-galaxy-s9-google-arcore-support/

This means Galaxy S9 owners are now able to try out ARCore-based augmented reality apps, which use your phone's camera to place virtual objects in the real world. You can use this to measure objects in your house, add 3D creatures to your photos or play video games in the streets of your neighborhood.

The Galaxy S9 already has AR -- as seen in Samsung's creepy-looking AR Emoji -- but support for ARCore has the potential to make AR on the phone much better.