The main advantage of using an integrated development environment (IDE) is its ability to streamline the software development process by providing a comprehensive suite of tools in a unified interface. IDEs typically include features such as code editors, debuggers, and compilers, which enhance productivity and reduce development time. The built-in tools enable developers to write, test, and debug code seamlessly without switching between different applications. Moreover, IDEs often provide syntax highlighting, auto-completion, and version control integration, making it easier to maintain code quality and manage collaborative projects effectively, ultimately enhancing overall development efficiency.