Pilot Wave Theory is an interpretation of quantum mechanics that suggests particles are guided by a "pilot wave." This wave is a real physical entity that influences the behavior of particles, providing a deterministic framework for their motion. Unlike traditional quantum mechanics, which relies on probabilities, Pilot Wave Theory posits that particles have definite positions and velocities at all times. In this theory, the wave function, which describes the system, acts as a guiding field for particles. Developed by Louis de Broglie in the 1920s, it offers an alternative to the standard Copenhagen interpretation and aims to reconcile quantum mechanics with classical physics principles.