AI agents are advanced autonomous systems that process data, make decisions, and act within their environments to achieve specific goals, leveraging modern large language models (LLMs) for reasoning and decision-making. These agents, categorized as simple reflex, model-based, goal-based, utility-based, and learning agents, offer benefits such as faster information analysis, increased productivity, enhanced customer experience, and improved data quality. AI agents function through components like sensors, actuators, and a reasoning engine, and can be human-activated or event-activated. Tools like LangChain and platforms like n8n facilitate the creation and deployment of AI agents, allowing integration with various apps and services. While AI agents can significantly accelerate software development and automate complex tasks, they are not fully autonomous and often require human input, exemplified by systems like ChatGPT. Multi-agent systems further enhance capabilities by enabling coordination among specialized agents to achieve complex goals, with ongoing learning and adaptation through techniques like few-shot learning and prompt optimization.