diff --git a/core/lib/Drupal/Core/Config/Config.php b/core/lib/Drupal/Core/Config/Config.php
index 51880a2..7ad1aee 100644
--- a/core/lib/Drupal/Core/Config/Config.php
+++ b/core/lib/Drupal/Core/Config/Config.php
@@ -20,7 +20,7 @@
  * Defines the default configuration object.
  *
  * Encapsulates all capabilities needed for configuration handling for a
- * specific configuration name including support for runtime overrides. The
+ * specific configuration object, including support for runtime overrides. The
  * overrides are handled on top of the stored configuration so they are not
  * saved back to storage.
  */
diff --git a/core/lib/Drupal/Core/Config/ConfigBase.php b/core/lib/Drupal/Core/Config/ConfigBase.php
index 1df19aa..8dfac43 100644
--- a/core/lib/Drupal/Core/Config/ConfigBase.php
+++ b/core/lib/Drupal/Core/Config/ConfigBase.php
@@ -15,11 +15,15 @@
  * Provides a base class for configuration objects with get/set support.
  *
  * Encapsulates all capabilities needed for runtime configuration handling for
- * a specific configuration name. Extend from this class for non-storable
- * configuration where the configuration API is desired but storage is not
- * possible. For example, if the data is derived at runtime.
+ * a specific configuration object.
+ *
+ * Extend directly from this class for non-storable configuration where the
+ * configuration API is desired but storage is not possible; for example, if
+ * the data is derived at runtime. For storable configuration, extend
+ * \Drupal\Core\Config\StorableConfigBase.
  *
  * @see \Drupal\Core\Config\StorableConfigBase
+ * @see \Drupal\Core\Config\Config
  * @see \Drupal\Core\Theme\ThemeSettings
  */
 abstract class ConfigBase extends DependencySerialization {
diff --git a/core/lib/Drupal/Core/Config/StorableConfigBase.php b/core/lib/Drupal/Core/Config/StorableConfigBase.php
index f1e43a3..8aa292b 100644
--- a/core/lib/Drupal/Core/Config/StorableConfigBase.php
+++ b/core/lib/Drupal/Core/Config/StorableConfigBase.php
@@ -17,9 +17,11 @@
  * Provides a base class for configuration objects with storage support.
  *
  * Encapsulates all capabilities needed for configuration handling for a
- * specific configuration name including storage and data type casting. Extend
- * from StorableConfigBase to manage configuration with a storage backend that
- * does not support overrides.
+ * specific configuration object, including storage and data type casting.
+ *
+ * The default implementation in \Drupal\Core\Config\Config adds support for
+ * runtime overrides. Extend from StorableConfigBase directly to manage
+ * configuration with a storage backend that does not support overrides.
  *
  * @see \Drupal\Core\Config\Config
  */