Metric Object

This object is associated with an impression as an array of metrics. These metrics can offer insight into the impression to assist with decisioning such as average recent viewability, click-through rate, etc.

Attribute	Triplelift Required	Attribute	Description
type	yes	string	Type of metric being represented using exchange curated string name which should be published to bidders
value	yes	float	Number representing the value of the metric
vendor	no; recommended	string	Source of the value using exchange curated string names which should be published to bidders
ext	no	object	Placeholder for exchange-specific extensions to OpenRTB