A truth table is a mathematical table used in logic to determine the truth values of logical expressions based on their inputs. Each row of the table represents a possible combination of truth values for the variables involved, typically denoted as True or False. The table systematically shows how the output of a logical operation, such as AND, OR, or NOT, changes based on different input values. Truth tables are essential in fields like computer science, mathematics, and philosophy for analyzing logical statements and circuits. They help in simplifying complex expressions and verifying the validity of logical arguments. By providing a clear visual representation, truth tables make it easier to understand how different logical operations interact.