Case-Based Reasoning (CBR) is a problem-solving approach that uses past experiences, or "cases," to understand and resolve new issues. When faced with a problem, CBR retrieves similar cases from a database, analyzes them, and applies the solutions or insights gained to the current situation. This method is particularly useful in fields like medicine, law, and customer support. The process typically involves four steps: retrieving relevant cases, reusing the solutions from those cases, revising the proposed solution if necessary, and retaining the new case for future reference. By learning from previous experiences, CBR helps improve decision-making and efficiency over time.