> ## Documentation Index
> Fetch the complete documentation index at: https://docs.trypillow.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# Offer rewards and collect identifiers
> Reward participants for completing an interview and collect a way to reach them.
A reward gives participants a reason to finish the interview. Your agent announces it during the interview, and Pillow collects a contact identifier so you can reach the people you owe.
Pillow doesn't process or pay out rewards. You decide and fulfill the reward yourself (a gift card, store credit, swag) using the identifiers you collect here.
## Set up a reward
Configure rewards in the **Study Builder** when you create or edit a study. After a study is live, you can review the configuration read-only on the **Reward** tab in study settings.
In the builder, open the reward settings and turn on **Enable reward**.
Set **Attribution** to decide who receives the reward (see below).
Enter the reward in **What you're offering**. The agent uses this text verbatim, so write it the way you want participants to read it, for example `a 50€ Amazon gift card` or `a free t-shirt`.
Turn on **Collect an identifier** and pick what the agent asks for.
## Choose how the reward is given
**Attribution** controls who gets rewarded:
| Attribution | Who receives it | Extra setting |
| -------------------- | -------------------------------------------------------------------------------------- | --------------------- |
| **Draw** | A limited number of winners chosen at random from everyone who completes the interview | **Number of winners** |
| **Automatic reward** | Every participant who completes the interview | None |
Use a **Draw** when you want to cap cost (one \$100 winner), and an **Automatic reward** when every completion should be rewarded (a discount code for all).
## Guide the agent Optional
Use **Agent instructions** to tell the agent how to handle the reward. For example, "share voucher code `SUMMER15OFF` at the end of the interview," or private notes the agent should follow but never reveal to the participant.
## Collect an identifier
So you can reach winners or send rewards, the agent asks each participant for one identifier at the **end** of the interview.
| Identifier | What participants share |
| ---------------- | ------------------------------------------------------------ |
| **Email** | Their email address |
| **Phone number** | Their phone number |
| **Username** | Their account username |
| **Custom** | Whatever you define; set the exact label, like `employee ID` |
Already passing contact info as session [metadata](/guides/customize-metadata)? Turn **Collect an identifier** off so the agent doesn't ask for something you already have.
## Download collected identifiers
Identifiers are extracted from participant replies after each interview is summarized, then listed on the **Reward** tab in study settings.
1. Open your study and go to **Settings → Reward**.
2. Under **Collected identifiers**, see the running count and when the last one arrived.
3. Click **Download CSV** to export the full list.
Collected identifiers are personal data, so handle the CSV in line with your privacy policy.
## What's next
Set up your agent, goals, and reward in the builder.
Pass contact info you already have instead of collecting it.
Get your reward in front of more participants.
Understand what participants are told about the agent.