LangGraph helps you build complex **stateful applications**, like chatbots or agents, using a *graph-based approach*.
You define your application's logic as a series of steps (**Nodes**) connected by transitions (**Edges**) in a **Graph**.
The system manages the application's *shared state* using **Channels** and executes the graph step-by-step with its **Pregel engine**, handling things like branching, interruptions, and saving progress (**Checkpointing**).
