Taken from the same blog:

"Roughly, RAG is runtime prompt engineering where you build a system to dynamically add relevant things to your prompt before you ask the agent for an answer."

Have you tried asking Google LLM RAG or ChatGPT what RAG in the context of LLMs is?

> “Retrieval-Augmented Generation” is nothing more than a fancy way of saying “including helpful information in your LLM prompt.”