The "Buy 4, Get 1 Free" promotion is a great way to incentivize customers to purchase more. It's a good deal for those who enjoy these biscuits regularly.
The option for free delivery adds convenience and value to the purchase. It's always a plus when companies offer such services.
interesting to note that you made your purchase using Koko payment. This suggests that the product is accessible through various payment options, which is convenient for customers.