On Shopify, we can add an item in the cart by redirecting the user to a given URL.

Let's first prepare the URL to add the item. You must find the variant ID to add to the cart. Follow the Shopify documentation to find a variant ID.

Assuming that the variant ID is 42, the URL should be:

/cart/add?id=42

Or if you want to add more than one of this product to the cart:

/cart/add?id=42&quantity=1

You can then create the button in your campaign. Choose the action "Load new page", and use the URL you prepared previously:

When a visitor clicks the CTA, the product is added to their cart and they're redirected to the cart page.

Don't hesitate to contact our support if you have any questions.