What URL do I add on checkout?
Once you have an extension from Aheadworks for Magento 2 in your cart, you will be prompted to enter a domain name of the store where the extension will be installed, e.g. "http://my-store.com"
If you've got a multistore environment, you need to enter a base URL, e.g. if your backend login page has an address "https://thebestshop.com/index.php/admin", you need to enter "https://thebestshop.com"
In case you are not sure what the final domain name will be but already have a development store, its URL can be specified as well. However, don't forget to contact support (email@example.com) and ask them to change the URL attached to your license as soon as it will become known to you.