In SharePoint 2013, there are three types of application hosting models:
- SharePoint Hosted
- Provider Hosted
The goal of the Autohosted app model was to provide an easy way for developers to provision Azure resources such as web sites and SQL databases when deploying their custom apps.
As of Friday, Microsoft has discontinued the Autohosted app model. The program will officially end June 30, 2014 and if you have developed an Autohosted app, you are encouraged to move it to a provider hosted app model instead.
Incidentally, If you look for information on MSDN on Autohosted apps, you’ll see the following error: