This article provides an introductory overview of quantum random walks, highlighting their differences from classical walks and their applications in quantum information science. It begins with a physical example illustrating the concept, then introduces the two main models of quantum random walks. The first model, the discrete time quantum random walk, involves a particle on a line with a spin degree of freedom, where the particle's position is determined by a unitary transformation and a coin-flip operation. The second model, the continuous time quantum random walk, is based on a Hamiltonian that governs the evolution of the system. The article discusses the behavior of quantum random walks, showing that they exhibit different properties compared to classical walks, such as faster spreading and asymmetric distributions. It also explores the physical implementation of quantum random walks and their potential applications in quantum computing. The text highlights the importance of quantum mechanics in understanding these walks and how they can be used to develop more efficient algorithms. The article concludes by outlining open questions and future directions in the study of quantum random walks.This article provides an introductory overview of quantum random walks, highlighting their differences from classical walks and their applications in quantum information science. It begins with a physical example illustrating the concept, then introduces the two main models of quantum random walks. The first model, the discrete time quantum random walk, involves a particle on a line with a spin degree of freedom, where the particle's position is determined by a unitary transformation and a coin-flip operation. The second model, the continuous time quantum random walk, is based on a Hamiltonian that governs the evolution of the system. The article discusses the behavior of quantum random walks, showing that they exhibit different properties compared to classical walks, such as faster spreading and asymmetric distributions. It also explores the physical implementation of quantum random walks and their potential applications in quantum computing. The text highlights the importance of quantum mechanics in understanding these walks and how they can be used to develop more efficient algorithms. The article concludes by outlining open questions and future directions in the study of quantum random walks.