Laser tweezers are scientific tools that use focused laser beams to manipulate small particles, such as cells or molecules, without physical contact. By creating a gradient of light intensity, these lasers can trap and move objects in three dimensions, making them useful in various fields like biology and physics. Researchers often use laser tweezers to study the behavior of microscopic organisms or to assemble tiny structures. This technology allows scientists to explore complex interactions at the cellular level, contributing to advancements in areas like biophysics and nanotechnology.