What is Concurrent Viewers?
The number of people watching a stream at any given moment. Differs from average viewers, which is the mean over an entire session.
Concurrent viewers is a real-time snapshot of how many people are in your stream. This number fluctuates throughout a broadcast — it spikes when you receive a raid and dips when viewers leave.
Twitch uses your concurrent viewer count to rank you within category browse pages. More viewers means higher placement, which drives organic discovery.