From IBM ( for whom I've worked for ~30 years ) : -
This learning path introduces you to the universal application image (UAI). A UAI is an image that uses Red Hat’s Universal Base Image (UBI) as its foundation, includes the application being deployed, and also adds extra elements that make it more secure and scalable in Kubernetes and Red Hat OpenShift.
Specifically, a universal application image:
Is built from a Red Hat UBI
Can run on Kubernetes and OpenShift
Does not require any Red Hat licensing, so it’s freely distributable
Includes qualities that make it run more efficiently
Is supported by Red Hat when run in OpenShift
The articles in this learning path describes best practices for packaging an application, highlighting elements that are critical to include in designing the image, performing the build, and deploying the application.