PagerDuty is an incident reporting management system that provides notifications and automatic escalations to help engineering teams detect and fix issues as they arise with their infrastructure. The tutorial uses the Vonage Dispatch API to alert members of an engineering team whenever an incident occurs on any of their infrastructure, using Facebook Messenger as the primary medium and SMS as a fallback option. To follow along, you'll need PHP version 7.1 or Higher, Laravel 5.8, Ngrok, a Facebook Account, a PagerDuty Account, and a Vonage API Account. The tutorial covers setting up the Vonage account, creating a custom wrapper around the Vonage API, and integrating it with the Laravel application. It also discusses how to create a job class that dispatches the report incident job when an incident occurs in PagerDuty.