Switchboard is a service you can use to manage your Twilio phone numbers. What this means is that you can configure call/SMS routing and much more. When you use Switchboard, you set the rules for how calls and messages get through to you.
Switchboard uses the webhook functionality of Twilio to dynamically determine where to route your calls and SMS messages. In addition to the dashboard analytics available within your Switchboard account, you also have the ability to audit your raw Twilio Logs and Twilio Usage data.