Under Customers, you can see all individual customers who completed your post-purchase survey, along with a few data points about them.
You can click the ID to go to the Customer page and view more details about the purchase and details on this particular customer.
For each new customer, you can also see the total number of answers they have provided. These answers can be viewed in more detail by clicking the links on each customer's row.
You can also export the list of Customers by using the Export customers by using the top right button on the Customers page.