Step 1: Navigate to your dashboard.

Step 2: Click on the Create Discount option.

Step 3: Choose the Single Discount option.

Step 4: Enter "Flat 10 Best" in the item percentage field and set it to 10%.

Step 5: Confirm your settings.

Step 6: Specify that there's no condition of purchase.

Step 7: Indicate that this discount is only for the first-time customers.

Step 8: Click on Continue.

Step 9: Click on Continue and Create Discount.

And that's it! You've successfully created a flat 10% discount on Shopflo.