In a world increasingly reliant on automation and artificial intelligence, Multiagent Systems (MAS) are becoming essential for building complex large language models or multimodal models. These systems consist of multiple AI agents that interact within a shared environment, tackling challenges beyond the scope of a single agent. MAS enable smarter collaboration and decision-making by coordinating fleets of autonomous vehicles to manage traffic, optimizing supply chains, and enabling swarm robotics. By designing realistic environments, using scalable communication strategies, robust credit assignment mechanisms, efficient data annotation tools, and prioritizing ethical and safe deployments, developers can create effective multiagent systems that solve real-world challenges.