Description: Hierarchical models are structures that organize data or decisions into levels of importance or relevance, allowing for better interpretability and understanding of information. These models are characterized by their ability to decompose complex problems into simpler components, thus facilitating analysis and decision-making. In the context of explainable artificial intelligence (XAI), hierarchical models are particularly valuable as they enable users to understand how a conclusion or decision is reached through a series of logical steps. This hierarchical structure not only enhances model transparency but also helps identify and correct potential biases or errors in the decision-making process. Furthermore, hierarchical models can be used in various applications, from data classification to outcome prediction, providing a solid foundation for interpreting results in environments where trust and explainability are crucial. In summary, hierarchical models are powerful tools that combine the simplicity of structure with the complexity of data, offering a clear and accessible approach to understanding information systems.