CrewAI is a modular Python framework designed for building fully autonomous AI Agents. It provides core components such as an Agent Orchestrator for planning and decision making, a Tool Integration layer for connecting external APIs or custom actions, and a Memory Module to store and recall context across interactions. Developers define tasks, register tools, configure memory backends, and then launch Agents that can plan multi-step workflows, execute actions, and adapt based on results, making CrewAI ideal for creating intelligent assistants, automated workflows, and research prototypes.