Using GitOps and Internal Developer Platforms (IDPs) can greatly improve a DevOps setup by simplifying workflows and providing self-service layers for developers. IDPs act as an intermediary interface layer over GitOps principles, helping to simplify the process by allowing developers to focus solely on code without needing to interact with low-level files or YAML files. This is achieved through the use of resources in IDPs, which can handle the complexities of generating and updating YAML files, creating new environments, and provisioning infrastructure. By combining IDPs and GitOps, developers can work at a level of detail and complexity that they prefer, and the IDP can transform high-level requests into low-level functions sent through the pre-defined GitOps flow. This can lead to benefits such as saving time in development, reducing cloud costs, and improving consistency without making life unnecessarily complicated for developers or operators.