This presentation summarizes in-depth market research results that informed communication strategies and were used to develop, pilot, and scale up voluntary medical male circumcision (VMMC) interventions targeting identified segments of the male population, including men ages 15–29, in Zambia and Zimbabwe. The presentation was part of an August 2016 webinar about efforts by VMMC programmes supported by the US President’s Emergency Plan for AIDS Relief (PEPFAR) to make it a priority to reach clients ages 15–29.