A model registry serves as a central repository for version-controlling machine learning models as they transition through various stages, including training, production, monitoring, and deployment. It stores essential information such as metadata, lineage, model versions, and training jobs, facilitating model governance by providing insights into datasets used, model performance, and deployment history. The blog highlights the importance of model registries in collaborative environments, where team members explore different model versions, ensuring a comprehensive record of all experiments. It evaluates and compares several model registry tools, such as MLflow, Verta.ai, Comet, and neptune.ai, considering criteria like ease of automation, model stage tracking, dependency management, and team collaboration capabilities. The article emphasizes the need to assess these tools based on specific requirements, as they vary in features and functionalities, ranging from code-heavy solutions to low-code and AutoML options.