# Day 1 Lecture: RAG Fundamentals and types of RAG

> In this lecture, Zach shares some staggering statistics, like the fact that there are currently 160 zettabytes of unstructured data in the world, which is projected to double every two to three years. He discusses the importance of understanding unstructured data and how AI can help us make sense o…

- Web page: https://www.dataexpert.io/lesson/understanding-rag-lecture-day1-july2025-p737-l1174
- Program: [AIExpert](https://www.dataexpert.io/program/ai-expert)
- Module: Week 1: Prompt Engineering & Basic RAG
- Access: Requires enrollment in AIExpert
- Length: 44 min video
- Skills: NLP, LLMs, Data Modeling, ETL/ELT, Data Visualization
- Academy: DataExpert.io Academy

## About this lesson

In this lecture,  Zach shares some staggering statistics, like the fact that there are currently 160 zettabytes of unstructured data in the world, which is projected to double every two to three years. He discusses the importance of understanding unstructured data and how AI can help us make sense of it. He emphasizes the need to convert this data into more structured formats for better analysis and retrieval.

## Navigation

- Previous lesson: [Supplemental Session on Auto-prompt Optimization](https://www.dataexpert.io/lesson/supplemental-session-on-auto-prompt-optimization-jul2025-p737-l1297.md)
- Next lesson: [Day 1 Lab: Vectorizing Inputs into Milvus](https://www.dataexpert.io/lesson/understanding-rag-day1-lab-july2025-p737-l1175.md)