> ## Documentation Index
> Fetch the complete documentation index at: https://fromhazel.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Key Concepts: Threads, Memory, and Data Sources

> Learn how Hazel organizes conversations into threads, remembers your business context via Memory, and connects to your data sources.

A few concepts that will help you get more out of Hazel. None of these are complicated, but knowing them upfront will make everything click faster.

<AccordionGroup>
  <Accordion title="Threads">
    Every conversation with Hazel happens in a thread. Think of it like a chat conversation — Hazel remembers everything you've discussed within that thread, so you can ask follow-up questions naturally.

    Asked about revenue last week? Follow up with "break that down by channel" and Hazel knows exactly what you mean.

    Start a new thread when you're switching to a completely different topic. This keeps things clean and helps Hazel stay focused.
  </Accordion>

  <Accordion title="Ask vs Deep Thinking">
    Hazel has two modes for answering questions.

    **Ask** gives you fast answers in seconds. It's perfect for straightforward questions like "What was revenue yesterday?" or "What's our top-selling SKU this month?"

    **Deep Thinking** is for complex research that needs multi-step analysis. It takes a few minutes but digs much deeper — comparing time periods, cross-referencing data sources, and surfacing insights you might not have thought to ask about. To start a Deep Thinking question, click the **+** button in the text box.

    Most of the time, Ask is all you need. Use Deep Thinking when you want a thorough investigation. [Learn more about when to use each mode](/docs/features/ask-vs-deep-thinking).
  </Accordion>

  <Accordion title="Memory">
    Memory is the notebook Hazel carries between conversations. Teach it your definitions once — "active subscriber means someone with an active subscription who has ordered in the last 90 days" — and it sticks.

    **Org Memory** is shared with your team. **User Memory** is personal to you.

    [Set up your Memory](/docs/features/memory) to get answers that match how your team actually talks about your business.
  </Accordion>

  <Accordion title="Data sources">
    Hazel connects to dozens of platforms across marketing, sales, finance, support, and reviews. Once connected, your data syncs roughly every 6 hours — no manual uploads, no stale spreadsheets. After connecting, Hazel handles all data cleaning and setup — no manual configuration needed.

    This is what makes Hazel different from tools like ChatGPT or Claude, where you'd upload a CSV and hope it's current. Hazel is always connected to your live data, so the answers are always fresh.

    [Browse all available integrations](/docs/integrations/overview) to see what you can connect.
  </Accordion>

  <Accordion title="Scheduled Reports">
    Have a question you ask every Monday morning? Turn it into a scheduled report.

    Pick any question, choose a schedule (daily, weekly, or monthly), and tell Hazel where to deliver it — Slack or email. Hazel runs the report automatically and sends it on time, every time.

    [Set up your first scheduled report](/docs/features/scheduled-reports).
  </Accordion>

  <Accordion title="Weekly Reviews">
    A weekly review is a full business summary — revenue, orders, marketing, support, anomalies — with everything compared to the previous week so trends jump out. Set one up as a [scheduled report](/docs/features/scheduled-reports) and it lands in Slack or email every Monday.

    [Learn more about weekly reviews](/docs/features/weekly-reviews).
  </Accordion>

  <Accordion title="Alerts">
    Hazel will monitor your data in the background and notify you when something unusual happens. Revenue drops, rising CAC (customer acquisition cost), support ticket spikes — you'll know about it without having to check.

    [Learn more about alerts](/docs/features/alerts).
  </Accordion>

  <Accordion title="Inline Citations">
    Every number in Hazel's Deep Thinking responses is backed by a citation. Click any cited figure to see a simple equation showing the calculation and the source(s) used — so you can always verify where a number came from.

    This is how you build trust in the answers. You're never just taking Hazel's word for it; you can always verify.

    [Learn how citations work](/docs/features/citations).
  </Accordion>
</AccordionGroup>

## Start exploring

Now that you know the basics, head over to [Chat](/docs/features/chat) to see how conversations with Hazel work in practice — including tips for getting the best answers.