An example of the Giftnote widget can be seen on this page for example. This helps to build awareness for the customer that you have Giftnote functionality at the product page level.
This video explains how the pop-up works and how to edit it.
To add the Pop-up - simply add this script to your Shopify store's product liquid
<div class="giftnote-product-modal"></div>
The Below Video shows where to add this to your Shopify Theme Code. There is an optional div included in this video if you would like control over where the text snippet sits on the Product Page.
The modal will now appear on all product pages excluding Gift Vouchers.
Next Step: Integrate with Klaviyo