Data exhaust refers to the data generated as trails or information byproducts resulting from all digital or online activities. These consist of storable choices, actions and preference information that are generated for every process or transaction done digitally. This is mainly produced by manufacturers and retailers. A lot of data are collected by manufacturers, which they don’t need, but it’s needed by suppliers or for quality control. Data exhaust is also a revenue opportunity; the data which is not needed by the manufactures can be sold to the suppliers or a chain of suppliers. Read more at: http://www.datasciencecentral.com/profiles/blogs/what-is-data-exhaust-and-what-can-you-do-with-it