A dynamic checkout button - or a Buy it now button - is a button displayed next to the Add to cart button on your product page, and next to the Place your order button on the cart page.
This feature is enabled by selecting Show dynamic checkout button on your product page settings. When enabled, your customers can immediately buy the product they're viewing - but only single variants of a product.
Rather than completing the transaction through the theme's Cart page and then Shopify's Checkout page, the transaction is loaded through the checkout system of the chosen payment gateway to collect payment and shipping details.
The checkout method that is displayed on the button depends on:
Your payment settings, activated for your storefront
The customer's browser
The customer's device
The customer's personal payment history
The version of the theme you're working with
There are positive and negative factors associated with the dynamic checkout buttons on your storefront which should be considered before enabling this feature:
✅ Enables quick routes to immediate purchases. ✅ Instils a sense of urgency in your customers as an immediate call to action. ✅ Allows extra business functions with some payment system providers.
❌ Allows customers the ability to skip the Shopify payment system - many Shopify apps and Shopify Automatic Discounts rely on this system being used for the transaction, so this could negatively impact your storefront's functionality. ❌ Not customisable, beyond changing the colours of Shopify's own unbranded button.