Web-Agent is a Node.js library designed to turn natural language instructions into browser operations. It integrates with popular LLM providers (OpenAI, Anthropic, etc.) and controls headless or headful browsers to perform actions like scraping page data, clicking buttons, filling out forms, navigating multi-step workflows, and exporting results. Developers can define agent behaviors in code or JSON, extend via plugins, and chain tasks to build complex automation flows. It simplifies tedious web tasks, testing, and data gathering by letting AI interpret and execute them.