Service mapping is the practice of linking a business service to the processes, applications, infrastructure, and teams that keep it running. It goes beyond a raw asset inventory by showing how technology supports a specific outcome, such as customer access, payment processing, or internal communications. A useful map captures ownership, dependencies, and critical points of failure without becoming an unreadable list of every device or exception.
In cyber security, service mapping matters because it turns technical sprawl into operational insight. Defenders use it to scope risk assessments, decide which controls protect the most important services, and estimate blast radius during an incident. It also helps continuity planning and evidence gathering for compliance. Attackers benefit when service dependencies are unclear, because hidden links can expose a weak point in a high-value service. A good service map makes those links visible, helping teams detect impact faster and prioritize response.