The first part of this Practice Note sets out different types of criminal offences which may be committed in relation to content posted on social media platforms. This includes trolling, cyberbullying, virtual mobbing, cyberstalking, flaming, and setting up fake social media accounts. It also covers communications offences, CPS Guidance, substantive offences which may involve the use of social media, and some offences under the OSA 2023. The second part of the Practice Note focuses on civil causes of action which may arise—including defamation, misuse of private information, civil harassment, data protection, infringement of intellectual property (IP) rights, consumer protection and advertising regulations, disinformation, practical ways to bring an action, and the ‘right to be forgotten’ and to ‘erasure’. Brexit This Practice Note focuses primarily on UK social media offences and claims, but does consider where the European position may be relevant to UK-based practitioners and notes key divergence in this respect. This Practice Note also refers to a number of EU judgments insofar as these relate