Flash Sale Engine Overview Flash sales are time-limited discounts — typically 2–24 hours — that create urgency and drive conversion spikes. They require three things to work reliably: a countdown timer visible to shoppers, per-sale quantity limits that prevent overselling, and automatic price restoration when the sale ends. For high-traffic launches (product drops, Black Friday doorbusters), a virtual waiting room is also essential to prevent bot scalping. Most platforms have apps that handle this without custom code. When to Use This Skill - When launching time-limited sale events (e.g., 24-…