diff --git a/app/notifications/validators.py b/app/notifications/validators.py
index 5be9d4c494..f4a0dd507b 100644
--- a/app/notifications/validators.py
+++ b/app/notifications/validators.py
@@ -194,7 +194,9 @@ def validate_template(
     template_with_content = create_content_for_notification(template, personalisation)
 
     if template.template_type == SMS_TYPE:
+        # We are trying both metric types to see which one works best for us
         current_app.statsd_client.gauge('sms.content_length', template_with_content.content_count)
+        # Histogram is a DataDog specific method, which sends a histogram value to statsd.
         current_app.statsd_client.histogram('sms.content_length.histogram', template_with_content.content_count)
 
     if template.template_type == SMS_TYPE and template_with_content.content_count > SMS_CHAR_COUNT_LIMIT: