Delve (dlv) is a command-line debugger specifically designed for the Go programming language, providing tools to set breakpoints, inspect goroutines, and evaluate variables in real-time. It offers remote debugging capabilities and integrates with popular integrated development environments (IDEs) such as Visual Studio Code and GoLand. Installing Delve involves using the Go command to download it, ensuring that the GOPATH is correctly set in the system path. The debugger simplifies the process of stepping through code, allowing users to set breakpoints, continue execution, and modify variable values to understand code behavior better. Delve can also be run in a headless mode for remote or containerized debugging, making it versatile for various development environments. It is supported by various IDEs, with configurations available for integration, and serves as the underlying debugger for Go code in these platforms. Additionally, Delve can be utilized with Earthly for building and containerizing Go applications, enhancing debugging processes in complex build environments.