Custom attributes are additional properties for Data Marketplace objects that are defined by your Administrator in Metadata Command Center.
A stakeholder of a data collection can use custom attributes to specify additional information about a data collection when the standard properties of the collection are insufficient. Additionally, Data Users that order the data collection can use the newly added property to provide more information when they place an order.
For more information about custom attributes, see the Create custom attribute for items topic in the Set Up Data Marketplace help.