Provisioning, managing, and even deprecating infrastructure is a costly activity in terms of human capital. Furthermore, repeated attempts to build and modify environments manually can be fraught with errors. Whether working from prior experience or a well-documented runbook, the tendency for a human to make a mistake is a statistical probability.

We can automate the task of creating a complete environment. Task automation can help to effortlessly complete repetitive tasks and provide significant value. With IaC, we can define our infrastructure in the form of templates. A single template may consist of a part or the entirety of an environment. More importantly, this template can be used repeatedly to create the same identical environment time and again. 

In IaC, infrastructure is spun up and managed using code and CI. An IaC model helps you to interact with infrastructure programmatically at scale and avoid human errors by allowing you to automate resource configuration. That way, you can work with infrastructure in the same way that you would with code by using code-based tools. As the infrastructure is managed through code, so the application can be deployed using a standardized method, and any patches and versions can be updated repetitively without any errors. Some of the most popular infrastructure as code scripting tools are Ansible, Terraform and AWS CloudFormation.