It's super easy to create an embeddable note-card, just create a share code and copy the embed from within the share dropdown. Here's a quick walkthrough below:
Open the share dropdown and then click "Create new share link". Make sure 'Publicly Viewable' is turned on and then 'Generate Link'. Finally click on the share link to open up all the available options, and press 'Embed' button to copy the embed link.
If you would like to see some great use cases of embeddable cards, have a read of this article on our blog.