It's for cloud storage. I guess the question is if you know what S3 is? So these cloud providers have different HTTP APIs that can be used to manage them that are going to have somethings in common and not in common. But it's nice to have a single interface that makes it so you can manage storage from Amazon the same way as cloud storage from Microsoft. And so you can delete those remote files on the command line in a similar way as local files. Instead of typing this:

telnet azure.microsoft.com 80
HTTP1.1 DEL
/storage/{my-bucket}/{my-resource-identifier}
\r\n
X-BARER-TOKEN: 10e10910e900e0fv090da03910e0da0
\r\n
\r\n
^]
^d