Live selling glossary / Metrics
Peak viewers (peak concurrent viewers)
Also called: PCU, Peak concurrents
Definition
Peak viewers is the highest number of people watching a live show at the same moment. It is the standard measure of a show's reach, distinct from total unique viewers who passed through.
Peak usually lands in the first third of a show, after the notification wave and before churn sets in. Platforms with feed-driven discovery, like TikTok, post higher peaks than follow-driven ones like Whatnot, but the peak says nothing about buying intent: a 500-viewer TikTok room can out-sell or under-sell a 90-viewer Whatnot room.
The number
Median and 90th percentile peak viewers by platform are in the Live Selling Index. See this week's figures.
Related terms
Watch these numbers move in your own room
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