Description: Lessons learned in project management refer to the knowledge acquired throughout the process of carrying out a project, which can be used to improve the planning and execution of future projects. This concept involves reflecting on what worked well and what did not, allowing teams to identify effective practices and areas for improvement. Lessons learned are fundamental to fostering a culture of continuous learning within organizations, as they help avoid the repetition of past mistakes and replicate successes. This process focuses not only on final outcomes but also on the methodologies, tools, and approaches used during project development. Documenting and analyzing these lessons is essential for building a knowledge repository that can be consulted by other teams in the future. In summary, lessons learned are a critical component of project management, as they contribute to the evolution and improvement of organizational practices, promoting efficiency and effectiveness in project execution.