Webhooks
Webhooks are used to connect different systems. They provide a way of how they can talk with each other.
So whenever there is an update for an order, Mollie will fire a webhook and notify Prestashop about any updates, such as a payment status. This means, that Prestashop will need to provide a webhook endpoint for these notifications. And that is done by the Mollie plugin.
In most cases it's not necessary to configure anything to receive notifications.
However, if you are in a testing or staging environment, please make sure this URL is publicly available:
"http(s)://{{your-domain}}/module/mollie/webhook"
What IPs will the webhook requests be originating from?
If you want to create a whitelist for the IP range of Mollie, please refer to this page: https://help.mollie.com/hc/en-us/articles/213470829
