Unity ML-Agents is an open-source toolkit that enables developers to incorporate reinforcement learning (RL) and other machine learning techniques into their Unity projects. With ML-Agents, developers can train intelligent agents to navigate and interact with virtual environments, learn from their experiences, and improve their performance over time. ML-Agents leverages Unity's powerful game engine and simulation capabilities, allowing developers to create complex and immersive AI-driven experiences for games, simulations, and training applications.