The thesis is about how to create an e-commerce web app using the MERN stack. The online bookshop is the idea to apply this tech stack. The bookshop has basic functionalities of an e-commerce web app like creating and selling books. Users can register, log in, choose the books they like, and add them to their cart, then go to the payment page. They also can track their order status and apply discount coupons as well. Users can also sort/filter products, and add products to their wishlist for later purchase. Admin can modify order status, update books, and create categories.