Google will occasionally show what they call “price drop annotations” like you see below on the Dell product.
This label is applied by Google when a product’s price drops noticeably below its 90-day average (see the expanded annotation below), but there is no way to guarantee that the annotation will show, even if a product has a qualifying price drop. Google does not publish the exact criteria that make a product eligible, but this annotation is usually displayed on items with a price drop of 20% or more.
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Brian Roizen is the Cofounder and Chief Architect of Feedonomics, a full-service feed optimization platform that optimizes product data for hundreds of channels. He has been featured on numerous podcasts and eCommerce webinars, and regularly contributes to Search Engine Land and other industry-leading blogs. Brian graduated summa cum laude from UCLA with both a Bachelor’s and Master’s degree in Mechanical Engineering.