A flash sale is a limited-time promotion or event where products or services are offered at significantly discounted prices, often for a few hours or even minutes. These sales are typically announced with short notice and create a sense of urgency, encouraging customers to make quick purchases. Flash sales are popular among retailers and online businesses as a way to attract customers and boost sales, while also creating a sense of excitement and exclusivity for shoppers. They are known for their fast-paced and high-energy nature, making them a thrilling shopping experience for consumers.