title: What is the purpose of the WCF Activation feature?
body: <p>I create a WCF service in Visual Studio 2013 and publish it to IIS. I can the add a service reference in another project and consume methods on the service. When I go to the IIS Server Manager I see WCF Activation and its two sub-items (HTTP Activation and Non-HTTP Activation) unchecked.</p>
  
  <p>What are these features and how does my WCF site work without them enabled? I've looked around the web quite a bit and haven't found any definitive answers. Thanks.</p>