1. Convenience – the state of being able to do something easily.
Example: Online shopping offers great convenience for busy people.

2. Delivery – the process of bringing goods to someone.
Example: The delivery took three days.

3. Refund – money returned for a product or service.
Example: I received a refund for the damaged product.

4. Retailer – a business that sells goods to customers.
Example: Many retailers offer both online and physical stores.

5. Cart – a virtual container for items to buy online.
Example: I added the shoes to my cart.

6. Discount – a reduction in price.
Example: The store offers a 20% discount this weekend.

7. Receipt – a document showing proof of purchase.
Example: Keep your receipt for returns.

8. Bargain – something bought at a lower price.
Example: I found a bargain during the sale.

9. Browse – to look casually through items.
Example: I like to browse online stores for deals.

10. Stock – the supply of goods available.
Example: The item was out of stock online.

11. Customer service – assistance provided to shoppers.
Example: The customer service team resolved my issue quickly.

12. Checkout – the process of completing a purchase.
Example: I entered my payment details at checkout.

13. Return policy – rules for returning items.
Example: Check the return policy before buying clothes.

14. Shipping – the process of sending goods.
Example: Free shipping is available for orders over $50.

15. Payment method – how you pay for something.
Example: Credit card is my preferred payment method.