In many cases, there are so many customers simply abandon cart when they not have little question in their mind for the products or for the website.
If you are having a shop over the prestashop, this plugin is one of the key to get those customers who abandon the cart on your shop/website. Click here for plugin
Now the best feature for this plugin is the crons that you can setup to send email to the customers or to the admins as well.
Here are the codes that can be helpful while setting up the crons into you cPanel or hosting control panel.
*/30 * * * * wget -O /dev/null http://YOUR_WEBSITE.com/modules/superabandonedcart/launch_campaigns.php
30 * * * * http://YOUR_WEBSITE.com/modules/superabandonedcart/launch_campaigns.php