If a user has added a product to their cart but has not taken any action for a long time or is about to abandon it, you can encourage them to complete the order by showing a special free shipping pop-up. 

After activating this action from your panel, it is sufficient to set the average popup display time, taking into account the average order completion time on your site. 

With this action, you can; 

1- Reduce your abandoned cart rates. 

2- Increase your conversion rates.