Describe roles configuration in trainings

src/content/docs/additional-modules/trainings.mdx

@@ -15,6 +15,16 @@ To learn how to take a training that's been assigned to you, and how to monitor
 
 <YouTube id="ZVbjQxlnTlI" posterQuality="max" />
 
+## Configuring training roles
+
+Workspace administrators configure who holds each training role in the `Workspace Settings` → `Trainings` section. Three built-in roles control what people can do with trainings and training requests: **Qualified User**, **Manager**, and **QARA**. (You can also rename these roles and adjust their permission sets at the space-type level; see [Roles and permissions](/advanced-settings/roles).)
+
+What each training role typically allows:
+
+- **Qualified User** — Can create trainings and work only with their own trainings (not other people’s).
+- **Manager** — Can see other people’s trainings and sent training requests, and manage assignments for them, but cannot change the owner of those trainings or requests.
+- **QARA** — Everything **Manager** can do, plus the ability to change the owner of trainings created by others and of sent training requests.
+
 ## Creating a training
 
 To create a training, open the `My trainings` sub-menu in the Trainings module and click the `+ Training` button in the top right corner. Enter a name for your training and click `Create`.