This sensitive guide for carers and professionals working with children and young people explains the serious issues of sexual content and harm that children face online. Covering technologies used by children aged two through to adulthood, it offers clear, evidence-based information about sexual-based online harm, its effects and what adults can do to support children should they see, hear or bear witness to these events online. Catherine Knibbs, specialist advisor in the field, explains the issues involved when using online platforms and devices in family, social and educational settings. The guide offers an accessible explanation of how online harm impacts developmental, neurological and social development, as well as young people’s mental health and well-being. Examined in as non-traumatising a way as possible, the book covers key topics, including consent, pornography, online grooming, sexting, live streaming, revenge porn, ASD sexuality and gender, and vigilantism. Offering guidance and proactive and reactive strategies based on neuroscience and child development, it shows how e-safety is not one-size-fits-all and must consider the vulnerabilities of individual children and families. Children and Sexual-Based Online Harms will equip professionals and carers with the knowledge to support their work and to direct conversations about the online harms that children and young people face. It is essential reading for those training and working with children in psychological, educational and social work contexts, as well as parents, policy makers and those involved in the development of online technologies.