Host your webpages easily
Design your webpages from somewhere, and upload the webpages and its relevant resources in a zip file to this app. You can even preview how it will look after uploading.
This will be more useful, if your website doesn't need a customized backend. You can always the APIs of other apps like contacts, provided the relevant permissions are available to the user.
You can use this to run multiple marketing campaigns as you put a landing page and use the APIs of Contacts app to store the user signups.