This introductory micro-learning course provides a comprehensive overview of Large Language Models (LLMs), exploring their definition, practical use cases, and the concept of prompt tuning to enhance model performance. Participants will also be introduced to Google's Generative AI development tools, equipping them with the knowledge to develop their own Gen AI applications. Designed for individuals with no prior prerequisites, this course is suitable for a general audience and is available in multiple languages, including English, Spanish, French, Hebrew, Indonesian, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Traditional Chinese, Polish, Ukrainian, German, and Turkish.