diff --git a/generated/google/apis/analyticsadmin_v1alpha.rb b/generated/google/apis/analyticsadmin_v1alpha.rb
index 0ae0894d6d1..53cca8e1738 100644
--- a/generated/google/apis/analyticsadmin_v1alpha.rb
+++ b/generated/google/apis/analyticsadmin_v1alpha.rb
@@ -25,7 +25,7 @@ module Apis
     # @see http://code.google.com/apis/analytics/docs/mgmt/home.html
     module AnalyticsadminV1alpha
       VERSION = 'V1alpha'
-      REVISION = '20201031'
+      REVISION = '20201201'
 
       # Edit Google Analytics management entities
       AUTH_ANALYTICS_EDIT = 'https://www.googleapis.com/auth/analytics.edit'
diff --git a/generated/google/apis/analyticsadmin_v1alpha/service.rb b/generated/google/apis/analyticsadmin_v1alpha/service.rb
index 869232de4b9..3d684eeb73f 100644
--- a/generated/google/apis/analyticsadmin_v1alpha/service.rb
+++ b/generated/google/apis/analyticsadmin_v1alpha/service.rb
@@ -236,7 +236,9 @@ def list_accounts(page_size: nil, page_token: nil, show_deleted: nil, fields: ni
         #   "accounts/100"
         # @param [Google::Apis::AnalyticsadminV1alpha::GoogleAnalyticsAdminV1alphaAccount] google_analytics_admin_v1alpha_account_object
         # @param [String] update_mask
-        #   The list of fields to be updated. Omitted fields will not be updated.
+        #   Required. The list of fields to be updated. Omitted fields will not be updated.
+        #   To replace the entire entity, use one path with the string "*" to match all
+        #   fields.
         # @param [String] fields
         #   Selector specifying which fields to include in a partial response.
         # @param [String] quota_user
@@ -813,7 +815,9 @@ def list_properties(filter: nil, page_size: nil, page_token: nil, show_deleted:
         #   Example: "properties/1000"
         # @param [Google::Apis::AnalyticsadminV1alpha::GoogleAnalyticsAdminV1alphaProperty] google_analytics_admin_v1alpha_property_object
         # @param [String] update_mask
-        #   The list of fields to be updated. Omitted fields will not be updated.
+        #   Required. The list of fields to be updated. Omitted fields will not be updated.
+        #   To replace the entire entity, use one path with the string "*" to match all
+        #   fields.
         # @param [String] fields
         #   Selector specifying which fields to include in a partial response.
         # @param [String] quota_user
@@ -994,7 +998,9 @@ def list_property_android_app_data_streams(parent, page_size: nil, page_token: n
         #   androidAppDataStreams/2000"
         # @param [Google::Apis::AnalyticsadminV1alpha::GoogleAnalyticsAdminV1alphaAndroidAppDataStream] google_analytics_admin_v1alpha_android_app_data_stream_object
         # @param [String] update_mask
-        #   The list of fields to be updated. Omitted fields will not be updated.
+        #   Required. The list of fields to be updated. Omitted fields will not be updated.
+        #   To replace the entire entity, use one path with the string "*" to match all
+        #   fields.
         # @param [String] fields
         #   Selector specifying which fields to include in a partial response.
         # @param [String] quota_user
@@ -1125,7 +1131,9 @@ def list_property_firebase_links(parent, fields: nil, quota_user: nil, options:
         #   Output only. Example format: properties/1234/firebaseLinks/5678
         # @param [Google::Apis::AnalyticsadminV1alpha::GoogleAnalyticsAdminV1alphaFirebaseLink] google_analytics_admin_v1alpha_firebase_link_object
         # @param [String] update_mask
-        #   The list of fields to be updated. Omitted fields will not be updated.
+        #   Required. The list of fields to be updated. Omitted fields will not be updated.
+        #   To replace the entire entity, use one path with the string "*" to match all
+        #   fields.
         # @param [String] fields
         #   Selector specifying which fields to include in a partial response.
         # @param [String] quota_user
@@ -1266,7 +1274,9 @@ def list_property_google_ads_links(parent, page_size: nil, page_token: nil, fiel
         #   Note: googleAdsLinkId is not the Google Ads customer ID.
         # @param [Google::Apis::AnalyticsadminV1alpha::GoogleAnalyticsAdminV1alphaGoogleAdsLink] google_analytics_admin_v1alpha_google_ads_link_object
         # @param [String] update_mask
-        #   The list of fields to be updated. Omitted fields will not be updated.
+        #   Required. The list of fields to be updated. Omitted fields will not be updated.
+        #   To replace the entire entity, use one path with the string "*" to match all
+        #   fields.
         # @param [String] fields
         #   Selector specifying which fields to include in a partial response.
         # @param [String] quota_user
@@ -1447,7 +1457,9 @@ def list_property_ios_app_data_streams(parent, page_size: nil, page_token: nil,
         #   iosAppDataStreams/2000"
         # @param [Google::Apis::AnalyticsadminV1alpha::GoogleAnalyticsAdminV1alphaIosAppDataStream] google_analytics_admin_v1alpha_ios_app_data_stream_object
         # @param [String] update_mask
-        #   The list of fields to be updated. Omitted fields will not be updated.
+        #   Required. The list of fields to be updated. Omitted fields will not be updated.
+        #   To replace the entire entity, use one path with the string "*" to match all
+        #   fields.
         # @param [String] fields
         #   Selector specifying which fields to include in a partial response.
         # @param [String] quota_user
@@ -2051,7 +2063,9 @@ def list_property_web_data_streams(parent, page_size: nil, page_token: nil, fiel
         #   webDataStreams/2000"
         # @param [Google::Apis::AnalyticsadminV1alpha::GoogleAnalyticsAdminV1alphaWebDataStream] google_analytics_admin_v1alpha_web_data_stream_object
         # @param [String] update_mask
-        #   The list of fields to be updated. Omitted fields will not be updated.
+        #   Required. The list of fields to be updated. Omitted fields will not be updated.
+        #   To replace the entire entity, use one path with the string "*" to match all
+        #   fields.
         # @param [String] fields
         #   Selector specifying which fields to include in a partial response.
         # @param [String] quota_user
@@ -2091,7 +2105,9 @@ def patch_property_web_data_stream(name, google_analytics_admin_v1alpha_web_data
         #   properties/1000/webDataStreams/2000/enhancedMeasurementSettings"
         # @param [Google::Apis::AnalyticsadminV1alpha::GoogleAnalyticsAdminV1alphaEnhancedMeasurementSettings] google_analytics_admin_v1alpha_enhanced_measurement_settings_object
         # @param [String] update_mask
-        #   The list of fields to be updated. Omitted fields will not be updated.
+        #   Required. The list of fields to be updated. Omitted fields will not be updated.
+        #   To replace the entire entity, use one path with the string "*" to match all
+        #   fields.
         # @param [String] fields
         #   Selector specifying which fields to include in a partial response.
         # @param [String] quota_user
diff --git a/generated/google/apis/analyticsadmin_v1alpha/synth.metadata b/generated/google/apis/analyticsadmin_v1alpha/synth.metadata
index eea78d8167e..cc20341eb64 100644
--- a/generated/google/apis/analyticsadmin_v1alpha/synth.metadata
+++ b/generated/google/apis/analyticsadmin_v1alpha/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/google-api-ruby-client.git",
-        "sha": "d99b4075b0c4b6f712495b22315268d5f28038c0"
+        "sha": "7a5637108a19869b280d42d08528e17a5a6e3055"
       }
     }
   ]