Availability Zones are important components of cloud computing environments, especially in services like Amazon Web Services (AWS) and Microsoft Azure. Each AZ contains one or more data centers equipped with redundant power, networking, and connectivity, designed to provide high availability and fault tolerance for applications and services. By deploying applications across multiple AZs, organizations can enhance the resilience of their services, ensuring continued operation even in the case of hardware failures or other disruptions in one zone. Each AZ is connected to the others within the same region via low-latency links, allowing for synchronous data replication and failover capabilities.