This chapter examines shared mental models (SMMs) and their impact on employee performance in teams. Mental models are cognitive frameworks used to understand and predict the world, formed through interactions and reflections. SMMs involve collective understanding among team members regarding roles, tasks, equipment, and communication, enhancing coordination and decision-making. Various frameworks highlight the importance of understanding individual roles, team objectives, and interaction knowledge, enabling synchronized and efficient operations. Different types of SMMs are discussed, including those related to technology, tasks, team interactions, and member attributes. The review also explores factors affecting knowledge sharing, such as organizational culture, team dynamics, cultural differences, individual traits, motivation, and technology usability and their influence on employee performance.