How to obtain Shopify keys
To connect your Shopify store and your RSS Ground account you need to create a private Shopify app.
Log in to your Shopify store.
In the left sidebar of the admin area find the "Apps" section.
To create or edit your private Shopify apps click the "Manage private apps" link.
If you already have a private app, click on the app's name to get the keys.
If you don't have any private apps yet, you need to create one. Press "Create a new private app" button in the upper right corner.
Name your app and enter your email address.
Please, make sure you leave the list of app permissions INTACT.
That's it. Press Save.
Pay attention to API key and Password fields. You will be using these two credentials in RSS Ground.
Enter your Shopify store domain name (without https://), then paste API key and Password.
You can use the "Default settings" option to save your keys, to automatically enter them every time you wish to generate a new Shopify feed: