"Microsegmentation is a method of creating secure zones in data centers and cloud deployments that allows companies to isolate workloads from one another and secure them individually."
This Network Segmentation is not a new idea however, industries have implemented Virtual Local Area Networks (VLAN), Firewalls, Access Control Lists (ACL), etc. Individual separations lead to individual processes leading to a greater resistance to cyber attack. What makes Microsegmentation different is that is breaks it down even more. "Microsegmentation lets you do more fine-grained segmentation".