Social networks are an important part of children's and young people's lives - but many parents and adult caregivers feel overwhelmed when it comes to deciding at what age their child can use social networks, what the risks are or what settings are available. This is where the 'What is...' series comes in: each guide explains how each platform works and gives tips on how to use it safely. Guides are available for Instagram, TikTok, Snapchat, YouTube, WhatsApp and Roblox, as well as the Google Family Link parental control app.