Safer Internet Day 2021 will be celebrated in the UK with the theme: An internet we trust: exploring reliability in the online world. The campaign focuses on how we can decide what to trust online, supporting young people to question, challenge and change the online world for the better. It will explore how influence, persuasion and manipulation can impact young people's decisions, opinions and what they share online. It will also look at the emotional impact navigating a misleading online world can have on young people and why it is important to create a supportive, critical and questioning culture online that encourages debate and discussion. We want to give young people the skills to support one another, and the strategies to spot and speak out against harmful and misleading content online.