This midline report presents the findings of the second round of qualitative data collection conducted in October and November 2017 in Iringa region, Tanzania. Data collection was conducted across four villages that were selected as part of the quantitative treatment group. The qualitative midline aims to address the overarching question of how and why WN plus mNutrition messages triggered (or not) behaviour change related to child feeding and maternal nutrition in Tanzania. To achieve this, the midline has the following objectives:1. Document the implementation of WN plus mNutrition at community level; 2. Explore acceptability of WN plus mNutrition at household level; 3. Explore potential changes in key behaviours related to child and maternal nutrition. Findings from the qualitative midline study will be combined and triangulated with the quantitative endline and business model/cost-effectiveness endline in 2019.