Refunds issued by your PayPal merchant account are represented as a trending line graph in this insight. This gives you an overview of how many refunds you have issued and whether it is trending up or down.
You would ideally want to see no refunds issued, but these things happen. If you see too many refunds issued from your merchant account, reach out to your customers to understand why they request a refund in the first place. Consider adding more details to your product description and more images to your products so that users have a good understanding of what they are buying in the first place.
Note : You need a paypal merchant account to see relevant data. If you use a personal account for making payments, you won't be issuing refunds to anyone.