LangChain is a versatile AI framework designed to simplify the development of applications that leverage large language models (LLMs). It focuses on creating linear workflows by connecting LLMs with various data sources, APIs, and external tools to automate tasks like document retrieval, question answering, and chatbot interactions. LangChain provides modular components for prompt management, memory, and chaining calls to build step-by-step processes, making it easy to develop customizable, scalable AI-powered solutions. It’s widely used for applications that require straightforward, linear task execution rather than complex multi-agent orchestration.