Ultrafast laser spectroscopy is a technique that uses short bursts of laser light to study the behavior of molecules and materials on extremely fast timescales, often in the femtosecond range (one quadrillionth of a second). This allows scientists to observe rapid processes such as chemical reactions, energy transfer, and electron dynamics in real time. By analyzing how the material interacts with the laser light, researchers can gain insights into the structure and dynamics of various substances. This method is valuable in fields like chemistry, physics, and biochemistry, helping to advance our understanding of fundamental processes in nature.