code: public function description() {
  
  		# monitor the current status of user-selection (opt-in or opt-out)
  		$default = Inform_About_Content::default_opt_in( NULL );
  		// Misleading terminology, known issue: https://github.com/inpsyde/Inform-about-Content/issues/23
  		$subscribed_by_default = apply_filters( 'iac_default_opt_in', $default );
  
  		$description = $subscribed_by_default
  			? __( 'Note: Users must opt-out from e-mail notifications by default', Inform_About_Content::TEXTDOMAIN )
  			: __( 'Note: Users must opt-in to e-mail notifications by default', Inform_About_Content::TEXTDOMAIN );
  
  		printf(
  			'<p class="description">%s</p>',
  			$description
  		);
  	}
docs: prints the sections description, if it were needed
  
  @return void