Shopify allows you to create links that allow customers to purchase or add specific products to their cart via email or regular website.
"Buy Now" is a link that allows you to select only the eligible product and immediately proceed to the purchase process screen, while "Add to Cart" is a link that takes you to the cart screen after adding the eligible product.
add to cart: Actual code: https://store-dojo.com/cart/add?id=46819410903291&quantity=1
buy now: Actual code: https://store-dojo.com/cart/46819410903291:1