Service blueprints provide a visual map of a service process from the customer's perspective. They show customer actions and touchpoints, as well as frontstage and backstage employee actions and support processes. The key components are the customer actions line, line of visibility separating visible and invisible employee actions, line of internal interaction separating employee actions from support processes, and evidence of service. Service blueprints can be used for new service development, improving reliability, service recovery strategies, and informing various business functions like human resources, technology, marketing, and operations management.