data Interview Cécile Margnac, Snowflake: “Data clean room can add great value to retail promotional efficiency” Interviews Marketing campaigns, retail media, assortment, promotions... While Snowflake has managed to shake up offerings of traditional CDP suppliers such as Oracle or Teradata, Cécile Margnac, Senior Sales Engineer Manager Retail, FMCG and Luxury goods, analyses the potential of data clean rooms for retail and e-commerce.