diff --git a/systemd/libguides-notifier.service b/systemd/libguides-notifier.service
index fb76139..265891f 100644
--- a/systemd/libguides-notifier.service
+++ b/systemd/libguides-notifier.service
@@ -1,6 +1,11 @@
 # User-level systemd service to run main.py
 # Uses a wrapper script so the working directory and .env are found correctly.
 # Replace REPO_PATH automatically using the setup command we provide.
+# Install step 2 does three things:
+# - Replaces REPO_PATH with your repo’s absolute path in the COPY of this unit at ~/.config/systemd/user/
+#   so ExecStart points to the correct scripts/run_main.sh.
+# - Marks scripts/run_main.sh as executable (chmod +x).
+# - Reloads user units (systemctl --user daemon-reload) so systemd picks up the updated service/timer.
 [Unit]
 Description=Run main.py (LibGuides notifier)
 Wants=network-online.target