Why Functional Testing is a must for E-commerce Websites?

We need functional testing for eCommerce websites to check their specific features, such as Product Search functionality, Shopping Cart functionality, or even the Checkout process. Here are some examples of functional testing on those websites:

1. Test that users can search for products using different search terms.
2. Verify that the search results display the relevant products along with their prices, descriptions, and images.
3. Verify that users can update quantities, remove items, and empty the cart as needed.
4. Test the ability to add products to the shopping cart from product listings and product detail pages.
5. Test the entire checkout process, including providing shipping information, selecting payment methods, and reviewing the order.

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