The Digital Deployment CMS makes it really easy to pull in your Audience Groups but there are times where you don't want to display all of the groups on your webform.  This article describes how to customize your webform so only the MailChimp groups you want to display are displayed.

Generate your webform option list by "loading a pre-built option list". 

Once they are loaded, change the option back to "None".

From here, you can rename each group and/or use the red "X" on the right to remove any options you don't want to display. You can also re-order each option using the cross-arrows on the left. Don't forget to save the web form after your changes.  Lastly, testing the webform after these change is a recommended best practive.