You might have noticed, on the card widget, a label is visible directly on the cover:

If you want to change it, you have to go to the story and click on Story Settings :

In the left menu, in Story Settings, you can change the label visible on the card:

❗️ Once the changes have been made, you will need to republish the story.

💡 Pro tip: You can change the font in Widget > Settings > Label to match your branding.