First of all go to shopify app store and install Checkout extensions pro, Click HERE to install the this app.
Installation of Checkout Extension Pro is very easy. Click HERE to install the Checkout Extension Pro app.
You can add upsell/cross sell offers, such as AI product recommendations and shipping bars, by clicking the side arrow at the top of the checkout page inside the app.
You can open the content widgets by clicking on the side arrow at the top of the checkout page inside the app and select the content as per your choice like text banner or image banner etc.
Click on the Manage button at the top of the Thank You page in the app and enable it.
Please contact us at support@checkoutextensions.pro