Justine Roberts founded Mumsnet and transformed it into the UK's largest parenting network, attracting over 10 million monthly users. What began as a platform for parents has evolved into one of Britain's most influential online communities, wielding such significant cultural and political power that politicians actively seek to engage with its audience.

Under Roberts' leadership, Mumsnet demonstrates how authentic user voices can drive meaningful engagement and create lasting impact. The platform's success lies in its ability to address genuine needs within the parenting community, fostering discussions that range from practical childcare advice to broader social and political issues.

Roberts has proven that community-driven platforms can achieve remarkable scale while maintaining authenticity and trust - a balance many digital platforms struggle to achieve.