diff --git a/OS/01/assistant/listen.py b/OS/01/assistant/listen.py
index 948ef9a..44a089b 100644
--- a/OS/01/assistant/listen.py
+++ b/OS/01/assistant/listen.py
@@ -1,3 +1,8 @@
+"""
+Listens to chunks of audio recorded by user.
+Run `python listen.py` to start the server, then `cd user` and run `python record.py` to record audio.
+"""
+
 from fastapi import FastAPI, WebSocket
 import uvicorn
 import json