/common/metrics.proto 

--- v24/common/metrics.proto    2026-07-21 22:02:13.000000000 +0000
+++ v25/common/metrics.proto    2026-07-21 22:02:31.000000000 +0000
@@ -1818,6 +1818,16 @@
   //  conversion_value_change_point_estimate +
   //  conversion_value_margin_of_error)`.
   optional double conversion_value_change_point_estimate = 472;
+
+  // The number of comments on YouTube Shorts videos attributed to ad
+  // impressions.
+  optional int64 youtube_comments = 528;
+
+  // The number of likes on YouTube Shorts videos attributed to ad impressions.
+  optional int64 youtube_likes = 529;
+
+  // The number of shares on YouTube Shorts videos attributed to ad impressions.
+  optional int64 youtube_shares = 530;
 }

 // Search volume range.