Technical
Alert
An on-screen pop-up (often with sound) that fires when someone follows, subscribes, or donates.
Related terms
- Overlay
The graphics layered on top of your gameplay — webcam border, alerts, recent-follower box, chat box, etc.
- Donation / Tip
Money sent directly to a streamer, usually through a service like StreamElements or Streamlabs, often triggering an on-screen alert.
- Follower vs Subscriber
A follower gets notified when you go live (free). A subscriber pays monthly to support you. You want both, but subs are income.