/resources/asset_group_signal.proto

--- v14/resources/asset_group_signal.proto  2023-10-18 04:25:31.000000000 +0000
+++ v15/resources/asset_group_signal.proto  2023-10-18 04:25:35.000000000 +0000
@@ -58,8 +59,37 @@
     }
   ];

-  // Immutable. The signal(audience criterion) to be used by the performance max
-  // campaign.
-  google.ads.googleads.v14.common.AudienceInfo audience = 3
-      [(google.api.field_behavior) = IMMUTABLE];
+  // Output only. Approval status is the output value for search theme signal
+  // after Google ads policy review. When using Audience signal, this field is
+  // not used and will be absent.
+  google.ads.googleads.v15.enums.AssetGroupSignalApprovalStatusEnum
+      .AssetGroupSignalApprovalStatus approval_status = 6
+      [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. Computed for SearchTheme signals.
+  // When using Audience signal, this field is not used and will be absent.
+  repeated string disapproval_reasons = 7
+      [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // The signal of the asset group.
+  oneof signal {
+    // Immutable. The audience signal to be used by the performance max
+    // campaign.
+    google.ads.googleads.v15.common.AudienceInfo audience = 4
+        [(google.api.field_behavior) = IMMUTABLE];
+
+    // Immutable. The search_theme signal to be used by the performance max
+    // campaign.
+    // Mutate errors of search_theme criterion includes
+    // AssetGroupSignalError.UNSPECIFIED
+    // AssetGroupSignalError.UNKNOWN
+    // AssetGroupSignalError.TOO_MANY_WORDS
+    // AssetGroupSignalError.SEARCH_THEME_POLICY_VIOLATION
+    // FieldError.REQUIRED
+    // StringFormatError.ILLEGAL_CHARS
+    // StringLengthError.TOO_LONG
+    // ResourceCountLimitExceededError.RESOURCE_LIMIT
+    google.ads.googleads.v15.common.SearchThemeInfo search_theme = 5
+        [(google.api.field_behavior) = IMMUTABLE];
+  }
 }