The List Description is a short sentence describing the purpose of your mailing list. It needs to fit on one line, and be less than 80 characters in length.
You can find this setting under List Moderator Settings in your mail-list account.
Use the Web Interface to Change Settings
Log into your mail-list account at https://database.mail-list.com.
- Click Customize Your List
- Click List Moderator Settings
- Click List Description
- Describe your mailing list in the space provided.
- Click Save.
The List Description is only shown in error messages and web page confirmations. Most often, your subscribers will not see the description.
Please see this post to learn how to access your account and change the settings.