diff --git a/storage/src/create_bucket_turbo_replication.php b/storage/src/create_bucket_turbo_replication.php
index 973a48c7c7..57744cd810 100644
--- a/storage/src/create_bucket_turbo_replication.php
+++ b/storage/src/create_bucket_turbo_replication.php
@@ -27,7 +27,7 @@
 use Google\Cloud\Storage\StorageClient;
 
 /**
- * Create a Cloud Storage Bucket with Turbo Replication set to `ASYNC_TURBO`.
+ * Create a Cloud Storage bucket with the recovery point objective (RPO) set to `ASYNC_TURBO`.
  * The bucket must be a dual-region bucket for this setting to take effect.
  *
  * @param string $bucketName The name of your Cloud Storage bucket.
@@ -49,7 +49,7 @@ function create_bucket_turbo_replication($bucketName, $location = 'nam4')
         'location' => $location,
         'rpo' => $rpo
     ]);
-    printf('Bucket with Turbo Replication set to \'ASYNC_TURBO\' created: %s' . PHP_EOL, $bucket->name());
+    printf('Bucket with recovery point objective (RPO) set to \'ASYNC_TURBO\' created: %s' . PHP_EOL, $bucket->name());
 }
 # [END storage_create_bucket_turbo_replication]
 
diff --git a/storage/src/get_turbo_replication_status.php b/storage/src/get_rpo.php
similarity index 93%
rename from storage/src/get_turbo_replication_status.php
rename to storage/src/get_rpo.php
index 269cb676af..7fc5f7164f 100644
--- a/storage/src/get_turbo_replication_status.php
+++ b/storage/src/get_rpo.php
@@ -27,11 +27,11 @@
 use Google\Cloud\Storage\StorageClient;
 
 /**
- * Get the bucket's Turbo Replication(rpo) setting.
+ * Get the bucket's recovery point objective (RPO) setting.
  *
  * @param string $bucketName the name of your Cloud Storage bucket.
  */
-function get_turbo_replication_status($bucketName)
+function get_rpo($bucketName)
 {
     // $bucketName = 'my-bucket';
 
diff --git a/storage/src/set_turbo_replication_async_turbo.php b/storage/src/set_rpo_async_turbo.php
similarity index 90%
rename from storage/src/set_turbo_replication_async_turbo.php
rename to storage/src/set_rpo_async_turbo.php
index 49e110c77c..713f96224a 100644
--- a/storage/src/set_turbo_replication_async_turbo.php
+++ b/storage/src/set_rpo_async_turbo.php
@@ -32,7 +32,7 @@
  *
  * @param string $bucketName the name of your Cloud Storage bucket.
  */
-function set_turbo_replication_async_turbo($bucketName)
+function set_rpo_async_turbo($bucketName)
 {
     // $bucketName = 'my-bucket';
 
@@ -45,7 +45,7 @@ function set_turbo_replication_async_turbo($bucketName)
     ]);
 
     printf(
-        'Turbo Replication has been set to ASYNC_TURBO for %s.' . PHP_EOL,
+        'The replication behavior or recovery point objective (RPO) has been set to ASYNC_TURBO for %s.' . PHP_EOL,
         $bucketName
     );
 }
diff --git a/storage/src/set_turbo_replication_default.php b/storage/src/set_rpo_default.php
similarity index 86%
rename from storage/src/set_turbo_replication_default.php
rename to storage/src/set_rpo_default.php
index e5f5cae8fa..f1283b99c7 100644
--- a/storage/src/set_turbo_replication_default.php
+++ b/storage/src/set_rpo_default.php
@@ -27,11 +27,11 @@
 use Google\Cloud\Storage\StorageClient;
 
 /**
- * Set the bucket's Turbo Replication(rpo) setting to `DEFAULT`.
+ * Set the bucket's replication behavior or recovery point objective (RPO) to `DEFAULT`.
  *
  * @param string $bucketName the name of your Cloud Storage bucket.
  */
-function set_turbo_replication_default($bucketName)
+function set_rpo_default($bucketName)
 {
     // $bucketName = 'my-bucket';
 
@@ -46,7 +46,7 @@ function set_turbo_replication_default($bucketName)
     ]);
 
     printf(
-        'Turbo Replication has been set to DEFAULT for %s.' . PHP_EOL,
+        'The replication behavior or recovery point objective (RPO) has been set to DEFAULT for %s.' . PHP_EOL,
         $bucketName
     );
 }
diff --git a/storage/test/TurboReplicationTest.php b/storage/test/TurboReplicationTest.php
index 538d796de1..0b29e749bf 100644
--- a/storage/test/TurboReplicationTest.php
+++ b/storage/test/TurboReplicationTest.php
@@ -22,7 +22,9 @@
 use PHPUnit\Framework\TestCase;
 
 /**
- * Unit tests for Turbo Replication(RPO)
+ * Unit tests to manage a bucket's recovery point objective (RPO). An RPO value set to `DEFAULT`
+ * indicates the default replication behavior is applied to the bucket.
+ * An RPO value set to `ASYNC_TURBO` indicates turbo replication is applied to the bucket.
  */
 class TurboReplicationTest extends TestCase
 {
@@ -52,7 +54,7 @@ public function testCreateBucketWithTurboReplication()
 
         $this->assertStringContainsString(
             sprintf(
-                'Bucket with Turbo Replication set to \'ASYNC_TURBO\' created: %s',
+                'Bucket with recovery point objective (RPO) set to \'ASYNC_TURBO\' created: %s',
                 self::$bucketName
             ),
             $output
@@ -63,9 +65,9 @@ public function testCreateBucketWithTurboReplication()
     }
 
     /** @depends testCreateBucketWithTurboReplication */
-    public function testGetTurboReplicationStatus()
+    public function testGetRpo()
     {
-        $output = self::runFunctionSnippet('get_turbo_replication_status', [
+        $output = self::runFunctionSnippet('get_rpo', [
             self::$bucketName,
         ]);
 
@@ -79,15 +81,15 @@ public function testGetTurboReplicationStatus()
     }
 
     /** @depends testCreateBucketWithTurboReplication */
-    public function testSetTurboReplicationStatusDefault()
+    public function testSetRpoDefault()
     {
-        $output = self::runFunctionSnippet('set_turbo_replication_default', [
+        $output = self::runFunctionSnippet('set_rpo_default', [
             self::$bucketName,
         ]);
 
         $this->assertEquals(
             sprintf(
-                'Turbo Replication has been set to DEFAULT for %s.' . PHP_EOL,
+                'The replication behavior or recovery point objective (RPO) has been set to DEFAULT for %s.' . PHP_EOL,
                 self::$bucketName
             ),
             $output
@@ -98,15 +100,15 @@ public function testSetTurboReplicationStatusDefault()
     }
 
     /** @depends testCreateBucketWithTurboReplication */
-    public function testSetTurboReplicationStatusAsyncTurbo()
+    public function testSetRpoAsyncTurbo()
     {
-        $output = self::runFunctionSnippet('set_turbo_replication_async_turbo', [
+        $output = self::runFunctionSnippet('set_rpo_async_turbo', [
             self::$bucketName,
         ]);
 
         $this->assertEquals(
             sprintf(
-                'Turbo Replication has been set to ASYNC_TURBO for %s.' . PHP_EOL,
+                'The replication behavior or recovery point objective (RPO) has been set to ASYNC_TURBO for %s.' . PHP_EOL,
                 self::$bucketName
             ),
             $output