Designing digital products without defining who you're designing for is like driving a car in the dark with your beams off. Not only is it crucial to understand your users, it's also essential to understand the variation of personas within your user group, how they interact and how a design choice will affect each one of them. Using real-world examples, Adrian Franklin, CPO and co-founder of the education startup Aula, will share his experience of using personas to drive strategic design choices when designing for teaching and learning.