Getting into the details of Microsoft Azure is beyond the scope of this book. However, the following subsection details the steps to start with it by creating an account and starting a subscription.
If you don't already have a Microsoft account, you need to create one by visiting http://www.microsoft.com/account. This URL might change in future and if so, you can just search online for Microsoft Account to find the right URL.
At the time of writing this book, if you sign up for the first time, Microsoft offers you a free trial for a month and a credit worth $200 to spend on the services on Azure, which is more than enough if you just need to follow through the examples in this book and use only ML Studio.
Once you are successfully signed in, you can visit https://manage.windowsazure.com/ to find different services available through Azure.