Infrastructure as Code (IaC) is the practice of managing infrastructure resources using machine-readable files as code. It involves using configuration files or scripts to automate the provisioning, deployment, and management of infrastructure resources, such as servers, networks, and storage.

With IaC, infrastructure is no longer manually configured or managed through a traditional graphical user interface (GUI). Instead, developers or operations teams define their infrastructure requirements in code, which can be version-controlled, tested, and deployed just like any other software application.

IaC helps eliminate the manual and error-prone process of setting up and managing infrastructure resources. It provides several benefits, including:

1. Consistency: Infrastructure is defined and deployed using code, ensuring consistency across different environments, such as development, staging, and production.

2. Scalability: IaC allows for easily scaling infrastructure resources up or down through code, making it easier to handle increased traffic or workloads.

3. Reproducibility: Infrastructure configurations can be versioned and reproducible, enabling easy rollback to previous versions if issues occur.

4. Collaboration: IaC promotes collaboration between development and operations teams, as both can use code to define and manage infrastructure.

There are various tools available for implementing IaC, such as Terraform, Ansible, Puppet, and Chef. These tools allow you to define infrastructure resources, dependencies, and configurations in a declarative or imperative manner, depending on the specific tool.

Overall, Infrastructure as Code helps automate and streamline the process of managing infrastructure, making it more efficient, scalable, and reliable. It aligns with the principles of DevOps by bringing infrastructure management closer to the development process and enabling more collaborative and agile approaches to infrastructure provisioning and management.