expiry date

Hi,
where do you want to show the expiration date on the [adverts_list] or on the Ad details pages?

Both are possible but also both require a different approach to do that.

On the [adverts_list] the only way to do that is to open a file wpadverts/templates/list-item.php and replace the code

<?php echo date_i18n( get_option( 'date_format' ), get_post_time( 'U', false, get_the_ID() ) ) ?>

with

<?php echo date_i18n( get_option( 'date_format' ), get_post_meta( get_the_ID(), '_expiration_date', true ) ) ?>

Note the changes in list-item.php file will be overwritten on WPAdverts update, in order to avoid that you should create a child template file for list-item.php as explained here https://wpadverts.com/documentation/child-themes-and-templates/