Description: Service replicas are instances of a service that run in a container orchestration environment, such as Docker Swarm or Kubernetes. In this context, these tools allow managing multiple containers in a distributed environment. Service replicas are essential for ensuring high availability and scalability of applications. Each replica acts as an independent instance of the service, meaning that if one fails, the others can continue to operate, thus ensuring that the service remains available to users. Additionally, replicas allow distributing the workload across different nodes in the cluster, optimizing performance and efficiency. Administrators can define the desired number of replicas when creating a service, and the orchestration tool takes care of maintaining that number by starting new replicas as needed. This feature is particularly useful in production environments where demand can vary, allowing organizations to quickly adapt to changes in traffic and workload. In summary, service replicas are a key tool in managing containerized applications, providing resilience and flexibility in modern IT infrastructure.