diff --git a/google/cloud/monitoring/__init__.py b/google/cloud/monitoring/__init__.py
index a95bc456..60f07f2d 100644
--- a/google/cloud/monitoring/__init__.py
+++ b/google/cloud/monitoring/__init__.py
@@ -64,6 +64,7 @@
 from google.cloud.monitoring_v3.types.common import TimeInterval
 from google.cloud.monitoring_v3.types.common import TypedValue
 from google.cloud.monitoring_v3.types.common import ComparisonType
+from google.cloud.monitoring_v3.types.common import ServiceTier
 from google.cloud.monitoring_v3.types.dropped_labels import DroppedLabels
 from google.cloud.monitoring_v3.types.group import Group
 from google.cloud.monitoring_v3.types.group_service import CreateGroupRequest
@@ -235,6 +236,7 @@
     "TimeInterval",
     "TypedValue",
     "ComparisonType",
+    "ServiceTier",
     "DroppedLabels",
     "Group",
     "CreateGroupRequest",
diff --git a/google/cloud/monitoring_v3/__init__.py b/google/cloud/monitoring_v3/__init__.py
index 3b18dfdb..77f1d7b9 100644
--- a/google/cloud/monitoring_v3/__init__.py
+++ b/google/cloud/monitoring_v3/__init__.py
@@ -40,6 +40,7 @@
 from .types.common import TimeInterval
 from .types.common import TypedValue
 from .types.common import ComparisonType
+from .types.common import ServiceTier
 from .types.dropped_labels import DroppedLabels
 from .types.group import Group
 from .types.group_service import CreateGroupRequest
@@ -215,6 +216,7 @@
     "ServiceLevelIndicator",
     "ServiceLevelObjective",
     "ServiceMonitoringServiceClient",
+    "ServiceTier",
     "SpanContext",
     "TextLocator",
     "TimeInterval",
diff --git a/google/cloud/monitoring_v3/services/notification_channel_service/async_client.py b/google/cloud/monitoring_v3/services/notification_channel_service/async_client.py
index 46d727cb..ff17dd21 100644
--- a/google/cloud/monitoring_v3/services/notification_channel_service/async_client.py
+++ b/google/cloud/monitoring_v3/services/notification_channel_service/async_client.py
@@ -29,6 +29,7 @@
 from google.api import label_pb2  # type: ignore
 from google.api import launch_stage_pb2  # type: ignore
 from google.cloud.monitoring_v3.services.notification_channel_service import pagers
+from google.cloud.monitoring_v3.types import common
 from google.cloud.monitoring_v3.types import mutation_record
 from google.cloud.monitoring_v3.types import notification
 from google.cloud.monitoring_v3.types import notification_service
diff --git a/google/cloud/monitoring_v3/services/notification_channel_service/client.py b/google/cloud/monitoring_v3/services/notification_channel_service/client.py
index ff563341..6f933d34 100644
--- a/google/cloud/monitoring_v3/services/notification_channel_service/client.py
+++ b/google/cloud/monitoring_v3/services/notification_channel_service/client.py
@@ -33,6 +33,7 @@
 from google.api import label_pb2  # type: ignore
 from google.api import launch_stage_pb2  # type: ignore
 from google.cloud.monitoring_v3.services.notification_channel_service import pagers
+from google.cloud.monitoring_v3.types import common
 from google.cloud.monitoring_v3.types import mutation_record
 from google.cloud.monitoring_v3.types import notification
 from google.cloud.monitoring_v3.types import notification_service
diff --git a/google/cloud/monitoring_v3/types/__init__.py b/google/cloud/monitoring_v3/types/__init__.py
index 580e317a..427f3a20 100644
--- a/google/cloud/monitoring_v3/types/__init__.py
+++ b/google/cloud/monitoring_v3/types/__init__.py
@@ -27,6 +27,7 @@
     TimeInterval,
     TypedValue,
     ComparisonType,
+    ServiceTier,
 )
 from .dropped_labels import DroppedLabels
 from .group import Group
@@ -143,6 +144,7 @@
     "TimeInterval",
     "TypedValue",
     "ComparisonType",
+    "ServiceTier",
     "DroppedLabels",
     "Group",
     "CreateGroupRequest",
diff --git a/google/cloud/monitoring_v3/types/alert.py b/google/cloud/monitoring_v3/types/alert.py
index bea993da..0d04d385 100644
--- a/google/cloud/monitoring_v3/types/alert.py
+++ b/google/cloud/monitoring_v3/types/alert.py
@@ -404,8 +404,8 @@ class LogMatch(proto.Message):
             Attributes:
                 filter (str):
                     Required. A logs-based filter. See `Advanced Logs
-                    Queries </logging/docs/view/advanced-queries>`__ for how
-                    this filter should be constructed.
+                    Queries <https://cloud.google.com/logging/docs/view/advanced-queries>`__
+                    for how this filter should be constructed.
                 label_extractors (Sequence[google.cloud.monitoring_v3.types.AlertPolicy.Condition.LogMatch.LabelExtractorsEntry]):
                     Optional. A map from a label key to an extractor expression,
                     which is used to extract the value for this label key. Each
@@ -417,7 +417,7 @@ class LogMatch(proto.Message):
                     generated by this condition.
 
                     Please see `the documentation on logs-based metric
-                    ``valueExtractor``\ s </logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor>`__
+                    ``valueExtractor``\ s <https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor>`__
                     for syntax and examples.
             """
 
diff --git a/google/cloud/monitoring_v3/types/common.py b/google/cloud/monitoring_v3/types/common.py
index c1a71544..b9fa83f0 100644
--- a/google/cloud/monitoring_v3/types/common.py
+++ b/google/cloud/monitoring_v3/types/common.py
@@ -22,7 +22,13 @@
 
 __protobuf__ = proto.module(
     package="google.monitoring.v3",
-    manifest={"ComparisonType", "TypedValue", "TimeInterval", "Aggregation",},
+    manifest={
+        "ComparisonType",
+        "ServiceTier",
+        "TypedValue",
+        "TimeInterval",
+        "Aggregation",
+    },
 )
 
 
@@ -39,6 +45,17 @@ class ComparisonType(proto.Enum):
     COMPARISON_NE = 6
 
 
+class ServiceTier(proto.Enum):
+    r"""The tier of service for a Workspace. Please see the `service tiers
+    documentation <https://cloud.google.com/monitoring/workspaces/tiers>`__
+    for more details.
+    """
+    _pb_options = {"deprecated": True}
+    SERVICE_TIER_UNSPECIFIED = 0
+    SERVICE_TIER_BASIC = 1
+    SERVICE_TIER_PREMIUM = 2
+
+
 class TypedValue(proto.Message):
     r"""A single strongly-typed value.
 
diff --git a/google/cloud/monitoring_v3/types/notification.py b/google/cloud/monitoring_v3/types/notification.py
index 1df93b17..b1da8ada 100644
--- a/google/cloud/monitoring_v3/types/notification.py
+++ b/google/cloud/monitoring_v3/types/notification.py
@@ -17,6 +17,7 @@
 
 from google.api import label_pb2  # type: ignore
 from google.api import launch_stage_pb2  # type: ignore
+from google.cloud.monitoring_v3.types import common
 from google.cloud.monitoring_v3.types import mutation_record
 from google.protobuf import wrappers_pb2  # type: ignore
 
@@ -63,6 +64,9 @@ class NotificationChannelDescriptor(proto.Message):
             corresponding type. Each label includes a
             description for how that field should be
             populated.
+        supported_tiers (Sequence[google.cloud.monitoring_v3.types.ServiceTier]):
+            The tiers that support this notification channel; the
+            project service tier must be one of the supported_tiers.
         launch_stage (google.api.launch_stage_pb2.LaunchStage):
             The product launch stage for channels of this
             type.
@@ -75,6 +79,9 @@ class NotificationChannelDescriptor(proto.Message):
     labels = proto.RepeatedField(
         proto.MESSAGE, number=4, message=label_pb2.LabelDescriptor,
     )
+    supported_tiers = proto.RepeatedField(
+        proto.ENUM, number=5, enum=common.ServiceTier,
+    )
     launch_stage = proto.Field(proto.ENUM, number=7, enum=launch_stage_pb2.LaunchStage,)
 
 
diff --git a/tests/unit/gapic/monitoring_v3/test_notification_channel_service.py b/tests/unit/gapic/monitoring_v3/test_notification_channel_service.py
index 3c25e779..167f60b0 100644
--- a/tests/unit/gapic/monitoring_v3/test_notification_channel_service.py
+++ b/tests/unit/gapic/monitoring_v3/test_notification_channel_service.py
@@ -45,6 +45,7 @@
 from google.cloud.monitoring_v3.services.notification_channel_service.transports.base import (
     _GOOGLE_AUTH_VERSION,
 )
+from google.cloud.monitoring_v3.types import common
 from google.cloud.monitoring_v3.types import mutation_record
 from google.cloud.monitoring_v3.types import notification
 from google.cloud.monitoring_v3.types import notification_service
@@ -987,6 +988,7 @@ def test_get_notification_channel_descriptor(
             type_="type__value",
             display_name="display_name_value",
             description="description_value",
+            supported_tiers=[common.ServiceTier.SERVICE_TIER_BASIC],
         )
         response = client.get_notification_channel_descriptor(request)
 
@@ -1001,6 +1003,7 @@ def test_get_notification_channel_descriptor(
     assert response.type_ == "type__value"
     assert response.display_name == "display_name_value"
     assert response.description == "description_value"
+    assert response.supported_tiers == [common.ServiceTier.SERVICE_TIER_BASIC]
 
 
 def test_get_notification_channel_descriptor_from_dict():
@@ -1048,6 +1051,7 @@ async def test_get_notification_channel_descriptor_async(
                 type_="type__value",
                 display_name="display_name_value",
                 description="description_value",
+                supported_tiers=[common.ServiceTier.SERVICE_TIER_BASIC],
             )
         )
         response = await client.get_notification_channel_descriptor(request)
@@ -1063,6 +1067,7 @@ async def test_get_notification_channel_descriptor_async(
     assert response.type_ == "type__value"
     assert response.display_name == "display_name_value"
     assert response.description == "description_value"
+    assert response.supported_tiers == [common.ServiceTier.SERVICE_TIER_BASIC]
 
 
 @pytest.mark.asyncio