I create a PDF presentation on Canva that will give a thorough explanation of who the business is, what it does/sell, how, why and how often. Its basically a product demonstration and in the case of a service this presentation will demonstrate how the service is offered. The term that is widely used in the industry lately, is "playbook". I create a powerpoint presentation in the form of a playbook which we attach to our initial cold email, in the cold-emailing process.