diff --git a/class/class-mainwp-backup.php b/class/class-mainwp-backup.php
index fdc9f9f..3d09b6d 100644
--- a/class/class-mainwp-backup.php
+++ b/class/class-mainwp-backup.php
@@ -161,6 +161,13 @@ class MainWP_Backup {
 		$dirs      = MainWP_Helper::get_mainwp_dir( 'backup' );
 		$backupdir = $dirs[0];
 		if ( ! defined( 'PCLZIP_TEMPORARY_DIR' ) ) {
+
+            /**
+             * Defines PCLZIP temporary directory.
+             *
+             * @const ( string ) Temporary backup directory.
+             * @source https://code-reference.mainwp.com/classes/MainWP.Child.MainWP_Backup.html
+             */
 			define( 'PCLZIP_TEMPORARY_DIR', $backupdir );
 		}
 
diff --git a/class/class-mainwp-child-back-up-wordpress.php b/class/class-mainwp-child-back-up-wordpress.php
index 5aeb044..600002c 100644
--- a/class/class-mainwp-child-back-up-wordpress.php
+++ b/class/class-mainwp-child-back-up-wordpress.php
@@ -1148,7 +1148,7 @@ class MainWP_Child_Back_Up_WordPress {
 	}
 
 	/**
-	 * Remove exclusoin rule.
+	 * Remove exclusion rule.
 	 *
 	 * @used-by MainWP_Child_Back_Up_WordPress::action() Fire off certain BackUpWordPress plugin actions.
 	 *
diff --git a/class/class-mainwp-child-plugins-check.php b/class/class-mainwp-child-plugins-check.php
index da4f9d2..93a7e07 100644
--- a/class/class-mainwp-child-plugins-check.php
+++ b/class/class-mainwp-child-plugins-check.php
@@ -6,7 +6,7 @@
  *
  * @package MainWP\Child
  *
- * Credits
+ * @Credits
  *
  * Plugin-Name: Vendi Abandoned Plugin Check
  * Plugin URI: https://wordpress.org/plugins/vendi-abandoned-plugin-check/
@@ -20,7 +20,7 @@ namespace MainWP\Child;
 /**
  * Class MainWP_Child_Plugins_Check
  *
- * Check if pugins have been abandoned.
+ * Check if plugins have been abandoned.
  */
 class MainWP_Child_Plugins_Check {
 
@@ -317,6 +317,13 @@ class MainWP_Child_Plugins_Check {
 		}
 
 		if ( ! defined( 'DAY_IN_SECONDS' ) ) {
+
+            /**
+             * Defines days in seconds.
+             *
+             * @const ( string ) Default: true.
+             * @source https://code-reference.mainwp.com/classes/MainWP.Child.MainWP_Child_Plugins_Check.html
+             */
 			define( 'DAY_IN_SECONDS', 24 * 60 * 60 );
 		}
 
diff --git a/class/class-mainwp-child-themes-check.php b/class/class-mainwp-child-themes-check.php
index d9af1bb..bf373d4 100644
--- a/class/class-mainwp-child-themes-check.php
+++ b/class/class-mainwp-child-themes-check.php
@@ -287,6 +287,13 @@ class MainWP_Child_Themes_Check {
 		}
 
 		if ( ! defined( 'DAY_IN_SECONDS' ) ) {
+
+            /**
+             * Defines days in seconds.
+             *
+             * @const ( string ) Default: true.
+             * @source https://code-reference.mainwp.com/classes/MainWP.Child.MainWP_Child_Themes_Check.html
+             */
 			define( 'DAY_IN_SECONDS', 24 * 60 * 60 );
 		}
 
diff --git a/class/class-mainwp-child.php b/class/class-mainwp-child.php
index 0152244..bfbcdde 100644
--- a/class/class-mainwp-child.php
+++ b/class/class-mainwp-child.php
@@ -116,6 +116,7 @@ class MainWP_Child {
 	 */
 	public function load_all_options() {
 
+	    /** @global object $wpdb WordPress object. */
 		global $wpdb;
 
 		if ( ! defined( 'WP_INSTALLING' ) || ! is_multisite() ) {
@@ -248,7 +249,15 @@ class MainWP_Child {
 
 		// Register does not require auth, so we register here.
 		if ( isset( $_POST['function'] ) && 'register' === $_POST['function'] ) {
+
+            /**
+             * Checks whether cron is in progress.
+             *
+             * @const ( bool ) Default: true
+             * @source https://code-reference.mainwp.com/classes/MainWP.Child.MainWP_Child.html
+             */
 			define( 'DOING_CRON', true );
+
 			MainWP_Utility::fix_for_custom_themes();
 			MainWP_Connect::instance()->register_site(); // register the site and exit.
 		}
diff --git a/class/class-mainwp-helper.php b/class/class-mainwp-helper.php
index c2b612d..5341754 100644
--- a/class/class-mainwp-helper.php
+++ b/class/class-mainwp-helper.php
@@ -213,8 +213,22 @@ class MainWP_Helper {
 			ob_end_clean();
 			if ( empty( $creds ) ) {
 				if ( ! defined( 'MAINWP_SAVE_FS_METHOD' ) ) {
+
+				    /**
+                     * Defines save file system method.
+                     *
+                     * @const ( string ) Defined save file system method.
+                     * @source https://code-reference.mainwp.com/classes/MainWP.Child.MainWP_Helper.html
+                     */
 					define( 'MAINWP_SAVE_FS_METHOD', get_filesystem_method() );
 				}
+
+                /**
+                 * Defines file system method.
+                 *
+                 * @const ( string ) Defined file system method.
+                 * @source https://code-reference.mainwp.com/classes/MainWP.Child.MainWP_Helper.html
+                 */
 				define( 'FS_METHOD', 'direct' );
 			}
 			$init = \WP_Filesystem( $creds );
diff --git a/class/class-mainwp-wordpress-seo.php b/class/class-mainwp-wordpress-seo.php
index 17bf083..32e33b0 100644
--- a/class/class-mainwp-wordpress-seo.php
+++ b/class/class-mainwp-wordpress-seo.php
@@ -171,6 +171,13 @@ class MainWP_WordPress_SEO {
 			$upload_dir = wp_upload_dir();
 
 			if ( ! defined( 'DIRECTORY_SEPARATOR' ) ) {
+
+			    /**
+                 * Defines reusable directory separator.
+                 *
+                 * @const ( string ) Directory separator.
+                 * @source https://code-reference.mainwp.com/classes/MainWP.Dashboard.MainWP_WordPress_SEO.html
+                 */
 				define( 'DIRECTORY_SEPARATOR', '/' );
 			}
 			$p_path = $upload_dir['basedir'] . DIRECTORY_SEPARATOR . 'wpseo-import' . DIRECTORY_SEPARATOR;
diff --git a/mainwp-child.php b/mainwp-child.php
index 205007c..f0e740a 100644
--- a/mainwp-child.php
+++ b/mainwp-child.php
@@ -20,13 +20,19 @@
 require_once ABSPATH . 'wp-includes' . DIRECTORY_SEPARATOR . 'version.php'; // Version information from WordPress.
 
 /**
- * Define MainWP Child Plugin Debug Mode. Default: false.
+ * Define MainWP Child Plugin Debug Mode.
+ *
+ * @const ( bool ) Whether or not MainWP Child is in debug mode. Default: false.
+ * @source https://code-reference.mainwp.com/classes/MainWP.Child.MainWP_Child.html
  */
 define( 'MAINWP_CHILD_DEBUG', false );
 
 if ( ! defined( 'MAINWP_CHILD_FILE' ) ) {
 	/**
 	 * Define MainWP Child Plugin absolute full path and filename of this file.
+     *
+     * @const ( string ) Defined MainWP Child file path.
+     * @source https://code-reference.mainwp.com/classes/MainWP.Child.MainWP_Child.html
 	 */
 	define( 'MAINWP_CHILD_FILE', __FILE__ );
 }
@@ -34,6 +40,9 @@ if ( ! defined( 'MAINWP_CHILD_FILE' ) ) {
 if ( ! defined( 'MAINWP_CHILD_PLUGIN_DIR' ) ) {
 	/**
 	 * Define MainWP Child Plugin Directory.
+     *
+     * @const ( string ) Defined MainWP Child Plugin Directory.
+     * @source https://code-reference.mainwp.com/classes/MainWP.Child.MainWP_Child.html
 	 */
 	define( 'MAINWP_CHILD_PLUGIN_DIR', plugin_dir_path( MAINWP_CHILD_FILE ) );
 }
@@ -41,6 +50,9 @@ if ( ! defined( 'MAINWP_CHILD_PLUGIN_DIR' ) ) {
 if ( ! defined( 'MAINWP_CHILD_URL' ) ) {
 	/**
 	 * Define MainWP Child Plugin URL.
+     *
+     * @const ( string ) Defined MainWP Child Plugin URL.
+     * @source https://code-reference.mainwp.com/classes/MainWP.Child.MainWP_Child.html
 	 */
 	define( 'MAINWP_CHILD_URL', plugin_dir_url( MAINWP_CHILD_FILE ) );
 }