# Lesson 15: Knowledge Base Setup

**URL:** <https://community.retellai.com/t/lesson-15-knowledge-base-setup/2933>\
**Category:** Module 4: Voice, Language & Quality\
**Created:** [May 31, 2026, 1:52am UTC](https://community.retellai.com/t/lesson-15-knowledge-base-setup/2933 "2026-05-31T01:52:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![system](https://canada1.discourse-cdn.com/flex008/uploads/retell1/original/2X/a/a06e2942efdc48016940732a05d1274957507ee3.png) [@system](https://community.retellai.com/u/system)\
**Post date:** [May 31, 2026, 1:52am UTC](https://community.retellai.com/t/lesson-15-knowledge-base-setup/2933/1 "2026-05-31T01:52:40Z")

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## Knowledge Base Setup

A Knowledge Base gives your agent access to reference information it can use during conversations.

### What Is It?

- A collection of documents, URLs, or text that the agent can search during a call
- When a caller asks a question, the agent looks up relevant info from the KB
- Much better than putting everything in the prompt (which has token limits)

### Creating a Knowledge Base

1. Go to **Knowledge Base** in the dashboard
2. Choose your source type:
  - **URLs** — crawl a website or specific pages
  - **Documents** — upload PDFs, Word docs, etc.
  - **Plain Text** — paste text directly

3. Give it a name and description
4. Process and review the ingested content

### Attaching to an Agent

- In your agent settings, select the Knowledge Base(s) to use
- You can attach multiple KBs to one agent
- The agent automatically searches relevant KBs when it needs information

### Best Practices

- Keep content well-organized and up-to-date
- Use clear headings and structure in your documents
- Test that the agent can find and correctly cite information
- Don’t overload with irrelevant content (it can confuse retrieval)
- Update the KB when your product, policies, or information changes