Create Custom, Reusable Code With Snippets
Snippets are pieces of handlebars code that you can copy and paste or pull into a Template Block using the snippet name.
To use Snippets add a Template Block to an email Notification, and simply call it using a Template Block:
Using the Notification preview allows you to see the Snippet rendered:
Customize your Snippet Content Using Variables
You can use variables to pull customized content into the Snippet, supplying the value for the variable inside the user profile sent via the Send API call.
Snippets and the Default Brand
If a snippet exists in the default brand, but not in a custom brand, the default brand snippet will render in the custom brand as long as there isn't a snippet with the same name native to that custom brand.
This means you can put any or all of your snippets in the default brand and call them into multiple custom brands. Think of custom brands as extending the default. They can still have their own custom snippets as well.