Flash sale is like a blue moon which occurs once in a while. These are more like deal of the day sale however, it does not necessarily last for the whole day. Online stores run these kind of sales to attract more and more customers over a popular product at a low cost.

Like deal of the day offers, these offers or say sale also come with either slashed prices or with a coupon code. Online stores like Myntra is quite popular for it's flash sale.