Terraform map variables allow you to manage configuration through key-value pairs, streamlining code across environments and regions without repetition. Common types include map(string) for single values, map(object) for structured configurations, and nested maps for handling complex setups like environment-specific resources. Using maps, you can easily set configurations like instance types or storage classes for different environments in a single variable, enhancing code efficiency and maintainability. Functions like lookup and for_each further simplify accessing and iterating over maps, making Terraform configurations adaptable and DRY-compliant.
