The Mixture of Experts (MoE) model is a neural network architecture that offers a scalable and efficient approach to deploying large language models (LLMs) by using specialized subnetworks to reduce computational demands. Unlike traditional dense transformer models that activate all parameters for each input, MoE employs a gating network to dynamically assign input tokens to a small, relevant subset of experts, which specialize in specific language or contextual patterns. This sparse activation significantly lowers computational and energy costs while maintaining high performance, making advanced AI more accessible, especially in resource-constrained environments. MoE's modular design allows for massive scalability without proportional increases in computing power, enabling real-time applications across various industries. Despite its benefits, the MoE model faces challenges such as training complexity, inference overhead, and hardware compatibility, but ongoing research and innovations, including developments from Google and open-source projects like OpenMoE, are addressing these limitations to broaden its capabilities and enhance its adoption.