Label Studio is an open-source data labeling platform that enhances the fine-tuning of large language models (LLMs) for domain-specific applications by allowing for the preparation of custom training data and the evaluation of responses through human feedback. The platform addresses the challenge of inherent biases in LLMs by enabling ongoing adjustments to align with specific application needs, emphasizing the importance of quality over quantity. The iterative process involves capturing user interactions, annotating responses, and refining models to improve contextual understanding and reduce irrelevant outputs. By leveraging technologies like LangChain and ChromaDB, Label Studio facilitates the construction of a Question-Answering (QA) system that utilizes domain-specific knowledge from sources like GitHub documentation, enabling continuous improvement through a feedback loop. This approach demonstrates the potential for creating more nuanced, domain-specific AI applications that align with user expectations and values, highlighting the necessity of ongoing fine-tuning to enhance the quality and relevance of AI-driven systems in real-world scenarios.