8fcb62ec_rics___Introduction___FT_Press__Considerations
[0] 2.7 [Metric] Knowledge [Construction] Percentage of population with knowledge of product, recollection of its advertising. [Purpose] Extent of familiarity with product beyond name recognition. [Considerations] 
Not a formal metric. Is this prompted or unprompted knowledge?
Marketing Metrics: Understanding Market Share and Related Metrics | Introduction | FT Press
Considerations