The Pinterest tool introduced in 2013 that adds details such as prices or recipe ingredients is Rich Pins.
Rich Pins are enhanced versions of ordinary Pins that automatically pull structured information from the source website. Depending on the type, a Rich Pin can display product pricing and availability, an article headline and author, or recipe information such as ingredients, serving size, cooking time, and dietary details.
The feature was important because it made Pinterest more useful as a discovery and planning service. Instead of showing only an image and a link, a Pin could provide context immediately. Product information helped shoppers evaluate an item, while recipe information let users judge whether a dish suited their needs before visiting the original page.
A frequent mistake is treating Product Pins and Rich Pins as completely separate alternatives. Product Pins are a specialized kind of Rich Pin focused on merchandise. Promoted Pins, by contrast, describe paid distribution, and Idea Pins are a different content format. Rich Pins depend on metadata supplied by the linked website and can update when that source information changes.