diff --git a/google-analytics-data/src/main/java/com/google/analytics/data/v1alpha/AlphaAnalyticsDataClient.java b/google-analytics-data/src/main/java/com/google/analytics/data/v1alpha/AlphaAnalyticsDataClient.java
index 5619ccf5..4bd879c3 100644
--- a/google-analytics-data/src/main/java/com/google/analytics/data/v1alpha/AlphaAnalyticsDataClient.java
+++ b/google-analytics-data/src/main/java/com/google/analytics/data/v1alpha/AlphaAnalyticsDataClient.java
@@ -372,7 +372,7 @@ public final UniversalMetadata getUniversalMetadata(GetUniversalMetadataRequest
   // AUTO-GENERATED DOCUMENTATION AND METHOD
   /**
    * Returns metadata for dimensions and metrics available in reporting methods. Used to explore the
-   * dimensions and metrics. In this method, a Google Analytics App + Web Property Identifier is
+   * dimensions and metrics. In this method, a Google Analytics 4 (GA4) Property Identifier is
    * specified in the request, and the metadata response includes Custom dimensions and metrics as
    * well as Universal metadata.
    *
@@ -390,8 +390,8 @@ public final UniversalMetadata getUniversalMetadata(GetUniversalMetadataRequest
    * </code></pre>
    *
    * @param name Required. The resource name of the metadata to retrieve. This name field is
-   *     specified in the URL path and not URL parameters. Property is a numeric Google Analytics
-   *     App + Web Property identifier.
+   *     specified in the URL path and not URL parameters. Property is a numeric Google Analytics 4
+   *     (GA4) Property identifier.
    *     <p>Example: properties/1234/metadata
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -404,7 +404,7 @@ public final Metadata getMetadata(MetadataName name) {
   // AUTO-GENERATED DOCUMENTATION AND METHOD
   /**
    * Returns metadata for dimensions and metrics available in reporting methods. Used to explore the
-   * dimensions and metrics. In this method, a Google Analytics App + Web Property Identifier is
+   * dimensions and metrics. In this method, a Google Analytics 4 (GA4) Property Identifier is
    * specified in the request, and the metadata response includes Custom dimensions and metrics as
    * well as Universal metadata.
    *
@@ -422,8 +422,8 @@ public final Metadata getMetadata(MetadataName name) {
    * </code></pre>
    *
    * @param name Required. The resource name of the metadata to retrieve. This name field is
-   *     specified in the URL path and not URL parameters. Property is a numeric Google Analytics
-   *     App + Web Property identifier.
+   *     specified in the URL path and not URL parameters. Property is a numeric Google Analytics 4
+   *     (GA4) Property identifier.
    *     <p>Example: properties/1234/metadata
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -435,7 +435,7 @@ public final Metadata getMetadata(String name) {
   // AUTO-GENERATED DOCUMENTATION AND METHOD
   /**
    * Returns metadata for dimensions and metrics available in reporting methods. Used to explore the
-   * dimensions and metrics. In this method, a Google Analytics App + Web Property Identifier is
+   * dimensions and metrics. In this method, a Google Analytics 4 (GA4) Property Identifier is
    * specified in the request, and the metadata response includes Custom dimensions and metrics as
    * well as Universal metadata.
    *
@@ -465,7 +465,7 @@ public final Metadata getMetadata(GetMetadataRequest request) {
   // AUTO-GENERATED DOCUMENTATION AND METHOD
   /**
    * Returns metadata for dimensions and metrics available in reporting methods. Used to explore the
-   * dimensions and metrics. In this method, a Google Analytics App + Web Property Identifier is
+   * dimensions and metrics. In this method, a Google Analytics 4 (GA4) Property Identifier is
    * specified in the request, and the metadata response includes Custom dimensions and metrics as
    * well as Universal metadata.
    *
diff --git a/grpc-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/AlphaAnalyticsDataGrpc.java b/grpc-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/AlphaAnalyticsDataGrpc.java
index e444ca2f..97d95941 100644
--- a/grpc-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/AlphaAnalyticsDataGrpc.java
+++ b/grpc-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/AlphaAnalyticsDataGrpc.java
@@ -468,7 +468,7 @@ public void getUniversalMetadata(
      * <pre>
      * Returns metadata for dimensions and metrics available in reporting methods.
      * Used to explore the dimensions and metrics. In this method, a Google
-     * Analytics App + Web Property Identifier is specified in the request, and
+     * Analytics 4 (GA4) Property Identifier is specified in the request, and
      * the metadata response includes Custom dimensions and metrics as well as
      * Universal metadata.
      * For example if a custom metric with parameter name `levels_unlocked` is
@@ -655,7 +655,7 @@ public void getUniversalMetadata(
      * <pre>
      * Returns metadata for dimensions and metrics available in reporting methods.
      * Used to explore the dimensions and metrics. In this method, a Google
-     * Analytics App + Web Property Identifier is specified in the request, and
+     * Analytics 4 (GA4) Property Identifier is specified in the request, and
      * the metadata response includes Custom dimensions and metrics as well as
      * Universal metadata.
      * For example if a custom metric with parameter name `levels_unlocked` is
@@ -778,7 +778,7 @@ public com.google.analytics.data.v1alpha.UniversalMetadata getUniversalMetadata(
      * <pre>
      * Returns metadata for dimensions and metrics available in reporting methods.
      * Used to explore the dimensions and metrics. In this method, a Google
-     * Analytics App + Web Property Identifier is specified in the request, and
+     * Analytics 4 (GA4) Property Identifier is specified in the request, and
      * the metadata response includes Custom dimensions and metrics as well as
      * Universal metadata.
      * For example if a custom metric with parameter name `levels_unlocked` is
@@ -905,7 +905,7 @@ protected AlphaAnalyticsDataFutureStub build(
      * <pre>
      * Returns metadata for dimensions and metrics available in reporting methods.
      * Used to explore the dimensions and metrics. In this method, a Google
-     * Analytics App + Web Property Identifier is specified in the request, and
+     * Analytics 4 (GA4) Property Identifier is specified in the request, and
      * the metadata response includes Custom dimensions and metrics as well as
      * Universal metadata.
      * For example if a custom metric with parameter name `levels_unlocked` is
diff --git a/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/Entity.java b/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/Entity.java
index 2b70ead1..2f71fa05 100644
--- a/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/Entity.java
+++ b/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/Entity.java
@@ -117,7 +117,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * <pre>
-   * A Google Analytics App + Web property id.
+   * A Google Analytics 4 (GA4) property id.
    * </pre>
    *
    * <code>string property_id = 1;</code>
@@ -140,7 +140,7 @@ public java.lang.String getPropertyId() {
    *
    *
    * <pre>
-   * A Google Analytics App + Web property id.
+   * A Google Analytics 4 (GA4) property id.
    * </pre>
    *
    * <code>string property_id = 1;</code>
@@ -480,7 +480,7 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * A Google Analytics App + Web property id.
+     * A Google Analytics 4 (GA4) property id.
      * </pre>
      *
      * <code>string property_id = 1;</code>
@@ -502,7 +502,7 @@ public java.lang.String getPropertyId() {
      *
      *
      * <pre>
-     * A Google Analytics App + Web property id.
+     * A Google Analytics 4 (GA4) property id.
      * </pre>
      *
      * <code>string property_id = 1;</code>
@@ -524,7 +524,7 @@ public com.google.protobuf.ByteString getPropertyIdBytes() {
      *
      *
      * <pre>
-     * A Google Analytics App + Web property id.
+     * A Google Analytics 4 (GA4) property id.
      * </pre>
      *
      * <code>string property_id = 1;</code>
@@ -545,7 +545,7 @@ public Builder setPropertyId(java.lang.String value) {
      *
      *
      * <pre>
-     * A Google Analytics App + Web property id.
+     * A Google Analytics 4 (GA4) property id.
      * </pre>
      *
      * <code>string property_id = 1;</code>
@@ -562,7 +562,7 @@ public Builder clearPropertyId() {
      *
      *
      * <pre>
-     * A Google Analytics App + Web property id.
+     * A Google Analytics 4 (GA4) property id.
      * </pre>
      *
      * <code>string property_id = 1;</code>
diff --git a/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/EntityOrBuilder.java b/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/EntityOrBuilder.java
index 1fca30c5..c675e01e 100644
--- a/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/EntityOrBuilder.java
+++ b/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/EntityOrBuilder.java
@@ -27,7 +27,7 @@ public interface EntityOrBuilder
    *
    *
    * <pre>
-   * A Google Analytics App + Web property id.
+   * A Google Analytics 4 (GA4) property id.
    * </pre>
    *
    * <code>string property_id = 1;</code>
@@ -39,7 +39,7 @@ public interface EntityOrBuilder
    *
    *
    * <pre>
-   * A Google Analytics App + Web property id.
+   * A Google Analytics 4 (GA4) property id.
    * </pre>
    *
    * <code>string property_id = 1;</code>
diff --git a/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/GetMetadataRequest.java b/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/GetMetadataRequest.java
index 75791b29..805edbcf 100644
--- a/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/GetMetadataRequest.java
+++ b/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/GetMetadataRequest.java
@@ -119,7 +119,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    * <pre>
    * Required. The resource name of the metadata to retrieve. This name field is
    * specified in the URL path and not URL parameters. Property is a numeric
-   * Google Analytics App + Web Property identifier.
+   * Google Analytics 4 (GA4) Property identifier.
    * Example: properties/1234/metadata
    * </pre>
    *
@@ -147,7 +147,7 @@ public java.lang.String getName() {
    * <pre>
    * Required. The resource name of the metadata to retrieve. This name field is
    * specified in the URL path and not URL parameters. Property is a numeric
-   * Google Analytics App + Web Property identifier.
+   * Google Analytics 4 (GA4) Property identifier.
    * Example: properties/1234/metadata
    * </pre>
    *
@@ -495,7 +495,7 @@ public Builder mergeFrom(
      * <pre>
      * Required. The resource name of the metadata to retrieve. This name field is
      * specified in the URL path and not URL parameters. Property is a numeric
-     * Google Analytics App + Web Property identifier.
+     * Google Analytics 4 (GA4) Property identifier.
      * Example: properties/1234/metadata
      * </pre>
      *
@@ -522,7 +522,7 @@ public java.lang.String getName() {
      * <pre>
      * Required. The resource name of the metadata to retrieve. This name field is
      * specified in the URL path and not URL parameters. Property is a numeric
-     * Google Analytics App + Web Property identifier.
+     * Google Analytics 4 (GA4) Property identifier.
      * Example: properties/1234/metadata
      * </pre>
      *
@@ -549,7 +549,7 @@ public com.google.protobuf.ByteString getNameBytes() {
      * <pre>
      * Required. The resource name of the metadata to retrieve. This name field is
      * specified in the URL path and not URL parameters. Property is a numeric
-     * Google Analytics App + Web Property identifier.
+     * Google Analytics 4 (GA4) Property identifier.
      * Example: properties/1234/metadata
      * </pre>
      *
@@ -575,7 +575,7 @@ public Builder setName(java.lang.String value) {
      * <pre>
      * Required. The resource name of the metadata to retrieve. This name field is
      * specified in the URL path and not URL parameters. Property is a numeric
-     * Google Analytics App + Web Property identifier.
+     * Google Analytics 4 (GA4) Property identifier.
      * Example: properties/1234/metadata
      * </pre>
      *
@@ -597,7 +597,7 @@ public Builder clearName() {
      * <pre>
      * Required. The resource name of the metadata to retrieve. This name field is
      * specified in the URL path and not URL parameters. Property is a numeric
-     * Google Analytics App + Web Property identifier.
+     * Google Analytics 4 (GA4) Property identifier.
      * Example: properties/1234/metadata
      * </pre>
      *
diff --git a/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/GetMetadataRequestOrBuilder.java b/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/GetMetadataRequestOrBuilder.java
index 97cd84ed..913374f9 100644
--- a/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/GetMetadataRequestOrBuilder.java
+++ b/proto-google-analytics-data-v1alpha/src/main/java/com/google/analytics/data/v1alpha/GetMetadataRequestOrBuilder.java
@@ -29,7 +29,7 @@ public interface GetMetadataRequestOrBuilder
    * <pre>
    * Required. The resource name of the metadata to retrieve. This name field is
    * specified in the URL path and not URL parameters. Property is a numeric
-   * Google Analytics App + Web Property identifier.
+   * Google Analytics 4 (GA4) Property identifier.
    * Example: properties/1234/metadata
    * </pre>
    *
@@ -46,7 +46,7 @@ public interface GetMetadataRequestOrBuilder
    * <pre>
    * Required. The resource name of the metadata to retrieve. This name field is
    * specified in the URL path and not URL parameters. Property is a numeric
-   * Google Analytics App + Web Property identifier.
+   * Google Analytics 4 (GA4) Property identifier.
    * Example: properties/1234/metadata
    * </pre>
    *
diff --git a/proto-google-analytics-data-v1alpha/src/main/proto/google/analytics/data/v1alpha/analytics_data_api.proto b/proto-google-analytics-data-v1alpha/src/main/proto/google/analytics/data/v1alpha/analytics_data_api.proto
index f35d308f..3e8c7b6a 100644
--- a/proto-google-analytics-data-v1alpha/src/main/proto/google/analytics/data/v1alpha/analytics_data_api.proto
+++ b/proto-google-analytics-data-v1alpha/src/main/proto/google/analytics/data/v1alpha/analytics_data_api.proto
@@ -92,7 +92,7 @@ service AlphaAnalyticsData {
 
   // Returns metadata for dimensions and metrics available in reporting methods.
   // Used to explore the dimensions and metrics. In this method, a Google
-  // Analytics App + Web Property Identifier is specified in the request, and
+  // Analytics 4 (GA4) Property Identifier is specified in the request, and
   // the metadata response includes Custom dimensions and metrics as well as
   // Universal metadata.
   //
@@ -393,7 +393,7 @@ message UniversalMetadata {
 message GetMetadataRequest {
   // Required. The resource name of the metadata to retrieve. This name field is
   // specified in the URL path and not URL parameters. Property is a numeric
-  // Google Analytics App + Web Property identifier.
+  // Google Analytics 4 (GA4) Property identifier.
   //
   // Example: properties/1234/metadata
   string name = 1 [
diff --git a/proto-google-analytics-data-v1alpha/src/main/proto/google/analytics/data/v1alpha/data.proto b/proto-google-analytics-data-v1alpha/src/main/proto/google/analytics/data/v1alpha/data.proto
index dde58529..4ca21459 100644
--- a/proto-google-analytics-data-v1alpha/src/main/proto/google/analytics/data/v1alpha/data.proto
+++ b/proto-google-analytics-data-v1alpha/src/main/proto/google/analytics/data/v1alpha/data.proto
@@ -46,7 +46,7 @@ message DateRange {
 
 // The unique identifier of the property whose events are tracked.
 message Entity {
-  // A Google Analytics App + Web property id.
+  // A Google Analytics 4 (GA4) property id.
   string property_id = 1;
 }
 
diff --git a/synth.metadata b/synth.metadata
index c15bb5b3..baae81cb 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,15 +4,15 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-analytics-data.git",
-        "sha": "609457a68abaf439803bf9f3e147cb27b21e4853"
+        "sha": "4a3dfff12c4de094d210759b265236fd622bb581"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "7e400b0d3a810afe0f28226306eab2ba905df16b",
-        "internalRef": "338118656"
+        "sha": "da21c5639535f27aa9b43360000bec0b01cecde8",
+        "internalRef": "340335600"
       }
     },
     {