What is RAG system ??

[kelumwanninayaka]

What is RAG system ??

[RaniduNethma]

RAG stands for Retrieval-Augmented Generation.

In simple terms, RAG is a way to make AI answers smarter and more accurate by letting the model look up information before generating a response.

Why RAG exists

Large Language Models (LLMs) like ChatGPT:

• Don’t know private data

• May have outdated knowledge

• Can hallucinate (make things up)

RAG solves this by combining search + generation.

How RAG works (step by step)

1. User asks a question

• “What are the features of our Book Shop Management System?”

2. Retriever searches data

• Database

• PDFs

• Docs

• Knowledge base

• Vector database (embeddings)

3. Relevant information is fetched

• Only the most related content is selected

4. Generator (LLM) answers

• Uses the retrieved data as context

• Produces a grounded, accurate answer

[kelumwanninayaka]

Thank you