include callout on merging

Author: connorlindsey

content/preferences/commercial-unsubscribe.mdx

@@ -91,6 +91,8 @@ When a user unsubscribes by clicking the unsubscribe link, Knock displays a conf
 
 When a recipient clicks the unsubscribe link, their `default` preference set will be updated, marking `commercial_unsubscribe` as `true`. They will be opted-out of commercial messages, and they will continue to receive transactional messages based on their other preferences.
 
+This recipient-level preference will take precedence over other environment or tenant preferences. Learn more about [preference merging](/preferences/overview#preference-evaluation-rules).
+
 ## Learn more
 
 To learn more about managing recipient preferences and building preference centers with Knock, visit our [preferences overview](/preferences/overview).