Online youth radicalization is when young people who get exposed to specific types of content on the internet become more extreme in their beliefs and actions. This could mean doing things that are anti-social or even violent. It happens when young people get exposed to content or ideas that that encourage them to change the way they think, such as believing in extreme views or making extreme decisions. It's important to understand that being exposed to such content or ideas does not necessarily mean that young people will become radicalized. However when they become exposed to such content, it can lead to them adopting harmful behaviors.