Infrastructure as Code (IaC) is a practice that automates the management of infrastructure using code, providing a single source of truth for configuration and enabling version control. This approach helps alleviate the complexity of manually configuring infrastructure, especially as systems grow more complex. Tools like Ansible, Terraform, Chef, Salt, and Puppet facilitate this automation, each with unique capabilities and syntax. Ansible is known for its flexibility and agentless architecture, making it easy to use for diverse systems. Terraform is valued for its declarative nature and broad integration capabilities across multiple cloud providers. Chef, though requiring agents, offers powerful customization possibilities and a strong community, but has a steeper learning curve. Salt focuses on high-speed communication among numerous systems and is both declarative and extensible, while Puppet's long-standing presence in the configuration management world offers advanced capabilities and a mature GUI, though it may present some user experience challenges due to its age. Each tool can enhance infrastructure management, offering various features, community support, and levels of complexity to suit different user needs.