AI is reshaping how organizations work, learn, and compete. New tools emerge constantly, each offering unique strengths and challenges. This AI 101 guide explores the major categories of AI tools, practical tips for using them effectively, and a detailed look at platforms like ChatGPT, Claude, NotebookLM, Perplexity, Gemini, and more. Learn how to build an AI stack that supports productivity, innovation, and long-term business performance.