This chapter presents an introduction to the book, which explores nearly 15 years of Brazil’s evolving discursive and legal response to online misogyny. It introduces the Brazilian trajectory from early emblematic cases (e.g. the 2002 “Giovanna” episode and journalist Rose Leonel in 2005), which first highlighted the devastating personal and professional consequences of non-consensual image sharing. Conceptually, it distinguishes misogyny from sexism (after Kate Manne), defends the online–offline continuum, interdisciplinary and intersectional approaches, and situates online (or technology-facilitated) violence amid international human rights definitions and the politics of naming. Empirically, it outlines the scale and unequal effects of technology-facilitated gender-based violence and the role of architectures (speed, reach, permanence, anonymity, context collapse); legally, it lays out the theoretical basis for how the law is mobilised by society and goes on to name the legislative landmarks that recur throughout the book and structure the analysis, from the Carolina Dieckmann Law in 2012 against device hacking to recent developments around deepfakes and platform duties. The chapter also situates Brazil’s unique context (high internet use, connection asymmetries, gender and racial inequality, and experience in global internet governance spaces), showing how backlash and feminist organising have co-produced both the vocabulary and the normative terrain of regulation.