An OpenAPI specification offers more than just documentation by enabling features like client code generation and automated testing, as highlighted by Wordnik Founder Erin McKean during the Kong Summit. McKean provided an overview of the OpenAPI tools available and demonstrated how to create an OpenAPI spec in a few simple steps, emphasizing the spec's potential to elevate API functionality. The Kong Summit 2019 featured this talk among others, inviting participants to access recordings and attend future events, with a reminder about purchasing Super Early Bird tickets before a specified deadline.