Discount Spread refers to the discount range from the 1st to 3rd quartile and can be an indicator of the “sweet spot” in a brand/retailer’s discounting strategy. If there were 100 products currently sorted by the lowest to the highest price, the discounts for the 1st quartile refer to the of the 25th item in the listing whilst the 3rd quartile is the of the 75th item in the listing.
The Discount Spread acts as an indicator of what is the most concentrated discounting range a brand/retailer is focusing on a specific discounting timeline for a different category.
Learn more in How do I review price sensitivity over discount launches? article.