Bitrise's caching solution is designed to increase build speed by optimizing workflow efficiency. The company has introduced two main methods of caching: branch-based caching, which will be sunsetted in 2023, and dependency caching. Dependency caching uses key-based caching, where cache archives are associated with a key, allowing for the restoration of cached archives during workflows and saving build files into a cache archive at the end of the workflow. This method can be implemented by adding Restore Cache and Save Cache steps to workflows and using template elements such as checksum and getenv functions to create unique keys. Caching can also be used to optimize build artifacts, and Bitrise provides out-of-the-box automation Steps for popular build tools like Gradle, Bazel, and Tuist. Troubleshooting cache issues involves inspecting build logs and using the App settings to view current cache entries and download cache archives. Additionally, generic steps can be used to customize caching behavior, and steps can be skipped based on conditions such as PR builds or environment variables.