How do I Stop WordPress Notifications?

add_filter( 'auto_core_update_send_email', 'a1_stop_update_emails', 10, 4 );
 
function a1_stop_update_emails( $send, $type, $core_update, $result ) {
if ( ! empty( $type ) && $type == 'success' ) {
return false;
}
return true;
}
  
add_filter( 'auto_plugin_update_send_email', '__return_false' );
add_filter( 'auto_theme_update_send_email', '__return_false' );

Go to your functions.php file in your theme. Make sure you are using a Child Theme. Then add this code to the bottom of it.