OCPBUGS#11050: Explanation of option for ImageSetConfiguration

Author: xenolinux

modules/oc-mirror-creating-image-set-config.adoc

@@ -61,7 +61,7 @@ mirror:
 <2> Set the back-end location to save the image set metadata to. This location can be a registry or local directory. It is required to specify `storageConfig` values, unless you are using the Technology Preview OCI feature.
 <3> Set the registry URL for the storage backend.
 <4> Set the channel to retrieve the {product-title} images from.
-<5> Add `graph: true` to generate the OpenShift Update Service (OSUS) graph image to allow for an improved cluster update experience when using the web console. For more information, see _About the OpenShift Update Service_.
+<5> Add `graph: true` to build and push the graph-data image to the mirror registry. The graph-data image is required to create OpenShift Update Service (OSUS) applications. The `graph: true` field also generates the `UpdateService` CR manifest. The `oc` command-line interface (CLI) can use the `UpdateService` CR manifest to create OSUS applications. For more information, see _About the OpenShift Update Service_.
 <6> Set the Operator catalog to retrieve the {product-title} images from.
 <7> Specify only certain Operator packages and channels to include in the image set. Remove this field to retrieve all packages in the catalog.
 <8> Specify any additional images to include in image set.