Configuration management is a critical aspect of developing applications, and one of the most common decisions developers face is whether to use .properties or .yaml (also .yml) for storing configurations. Each format has its strengths and weaknesses, and selecting the right one can make a significant difference in terms of readability, maintainability, and flexibility. In this article, we will dive deep into both formats, exploring their syntax, use cases, and how they align with modern development practices. By the end, you’ll have a clear understanding of which format is better suited for your specific needs.