update docs/en/observability/apm/feature-roles.asciidoc

docs/en/observability/apm/feature-roles.asciidoc

@@ -77,16 +77,15 @@ Allows a user to view APM Agent central configurations, which is *required* when
 view monitoring data, or both.
 * <<apm-privileges-rum-source-mapping,*RUM source mapping role*>>: Allows a user to read RUM source maps.
 
-// TO DO: Replace <do something> with a common task made possible by the listed roles
 .Example: Assigning multiple roles to an APM Server user
 *****
-If you use agent central configuration to manage APM agents, you use RUM source mapping,
-and you want to create an APM Server user who can <do something>,
-you would need to assign these three roles to the user:
+If you want to create an APM Server user who can use the Elastic APM Real User Monitoring (RUM)
+JavaScript Agent to ingest data from a frontend application and you use central configuration
+to manage APM agents, you would need to assign these three roles to the user:
 
 * <<apm-privileges-to-publish-events,Writer role>>
 * <<apm-privileges-agent-central-config,Central configuration management role>>
-* <<apm-privileges-to-publish-events,RUM source mapping role>>
+* <<apm-privileges-rum-source-mapping,RUM source mapping role>>
 *****
 
 ////