In recent years, feminists have turned to digital technologies and social media platforms to dialogue, network, and organize against contemporary sexism, misogyny, and rape culture. The emergence of feminist campaigns such as #MeToo, #BeenRapedNeverReported, and Everyday Sexism are part of a growing trend of digital resistances and challenges to sexism, patriarchy, and other forms of oppression. Although recent scholarship has documented the ways digital spaces are often highly creative sites where the public can learn about and intervene in rape culture, little research has explored girls’ and women’s experiences of using digital platforms to challenge misogynistic practices. This is therefore the first book-length study to interrogate how girls and women negotiate rape culture through digital platforms, including blogs, Twitter, Facebook, Tumblr, and mobile apps. Through an analysis of high-profile campaigns such as Hollaback!, Everyday Sexism, and the everyday activism of Twitter feminists, this book presents findings of over 800 pieces of digital content, and semi-structured interviews with 82 girls, women, and some men around the world, including organizers of various feminist campaigns and those who have contributed to them. As our study shows, digital feminist activism is far more complex and nuanced than one might initially expect, and a variety of digital platforms are used in a multitude of ways, for many purposes. Furthermore, although it may be technologically easy for many groups to engage in digital feminist activism, there remain emotional, mental, or practical barriers that create different experiences, and legitimate some feminist voices, perspectives, and experiences over others.