Today's activists are on a virtual frontline. Some of the biggest social movements of recent decades started as hashtags. #BlackLivesMatter got millions of people worldwide to go and protest and #MeToo put Harvey Weinstein behind bars. Writer and feminist Tessel ten Zweege (25) also ventures into the virtual landscape of cyberactivism, in which she particularly speaks out for women's rights. Yet she increasingly wonders how effective cyberspace is as a battleground for her social activism. In the 3Lab: Tessel in Cyberspace she investigates how effective so-called hashtag activism actually is.