The administration of the vSphere environment often requires you to perform repetitive tasks that can be time-consuming, involving the same activities to be done for each component of the infrastructure, for example, migration of VMs or deploying new VMs from a template.  

The chance to automate some tasks will allow you to optimize your time, improving efficiency and ensuring consistency. Manually modifying the configuration  of 1,000 or more VMs, for example, will require a lot of time to complete the task, with the risk of missing some steps or making some errors. Automation can perform tasks in seconds with no errors and ensure consistency within the network, reducing the workload of the IT staff.

VMware offers some tools to automate tasks, such as PowerCLI, vCLI, vRealize Orchestrator (vRO), and vSphere Web Services SDK. vSphere Management Assistant (vMA) has been deprecated and version 6.5 is the final release.

Perhaps the most popular tools are PowerCLI and vCLI, but of course, the optimal solution is only what is suitable for your environment and needs.