The service is hosted in IIS, and the web.config is configured as:
<system.serviceModel><services>
<service name="Namespace.TypeName" …
Filename.svc is configured:
<% @ServiceHost Service="Namespace.TypeName " %>
When you browse to the filename.svc file:

TypeName Service
You have created a service.
To test this service, you will need to create a client and use it to call the service.

After looking through the documentation, I found that the service name is configured through the ServiceBehavior attribute:
[ServiceBehavior (Name = "The name of the service")]
public class TypeName {…

Hope this helps…