How does this work? Does it feed the PDF's text as a prompt to the LLM? How would you do this if you had, say, thousands of pages of a website? I feel like "ch

How does this work? Does it feed the PDF's text as a prompt to the LLM? How would you do this if you had, say, thousands of pages of a website? I feel like "chatbot/search engine hybrid which can consume a large website and know everything about the org it represents" is a powerful application.