Unity software is widely used in the game industry and has been integrated with Bitrise for automation. To use Unity on Bitrise, developers need to download and install the Unity editor and its platforms (Android and iOS) using specific scripts. The process involves setting up a custom workflow, installing the necessary packages, activating a valid license key, building the project, and deactivating the license at the end. With this integration, developers can automate their Unity software builds on Bitrise, generating APKs for Android and IPA files for iOS, making it easier to release their games and apps quickly.