How do we properly use the Add Response step to pass data to Responsive notify 2

If I have a conditional database update step how can I report that this step has been completed

I have the same question. I have an action with multiple steps and I want to set a response for responsive notify to show the response eg. I have product category delete action that first checks to see if there are any products in that category. If yes, do not delete and set response explaining why (to be displayed in responsive notify). If no, delete the product category and set the response to say success.
I have the logic working fine but I can't get the response message to be displayed by responsive notify.
Can you provide some documentation on how to use the response action?