Ajax is a technology that is enabled over 90% of the time and allows your visitors computer to communicate with Shopify and the Ajax-cart for Shopify app without reloading the visitors webpage.
This makes your cart feel more like a rock solid application and not a clunky old website.
Coupon Field on Cart Screen
Not only can your visitors enter their coupon codes on the cart screen, but since we have Ajax, they get a calculated discount in a couple seconds without reloading the webpage.
Popups are all optional.
Popups ~ Customizable
Popups are a great way to give your visitors a chance to get right to the checkout as well as see their discount so they are confident when pressing the Checkout button.
If popups are not your thing you will be glad to know that each popup is optional so you can use only the ones you want or none at all.
Auto Apply Discount Code
Lets say you have a sale going for Free Shipping on all orders. Pop a coupon code into the admin and a visitor adds a product and goes to the cart, they will have the code applied to their order and see the discount via Ajax (no webpage reload).
Discount Code from Link
Lets say you want visitors coming from an influencers blog to automatically receive a discount on their order, just add the discount code to the link on the blog and it will be auto-applied when they get to the cart page.