Sale price
Sale price is the temporarily discounted price of a product, submitted alongside the regular price so the channel can show the discount and display a strikethrough on the original.
In a feed you submit both the regular price and, when an item is discounted, a separate sale_price. The channel treats price as the baseline and sale_price as the active, lower price the shopper actually pays. You can also include a sale price effective date range to schedule when the discount runs.
It matters because sale pricing done correctly is a genuine performance lever. Channels can show a struck-through original price next to the lower sale price, which catches attention and improves click-through. But the discount has to be real; channels validate it against your site and may ignore or penalize fake or permanent 'sales'.
In the feed, sale_price must be lower than price and use the same currency, and the prices must match what the shopper sees on the landing page. A frequent mistake is leaving a stale sale_price in place after a promotion ends, which causes a mismatch.
MartechFlow can map both price and sale_price from your data, and because the discount percentage is computed from the two, you can drive both rule-based image badges (like an 'X% off' overlay) and custom labels from the same values, all refreshed automatically.