Facebook, Instagram, Snapchat, TikTok: generally speaking, younger generations are more likely to recognise and engage with the platforms at the latter of this list.

Social media platforms all started out as the domains of teenagers and young adults. Facebook was only for college kids back when it began in 2004. In 2012, Facebook bought Instagram for the famous $1 billion price tag – partly because it was young and hip. In 2013, Snapchat’s core audience was 13-25-year olds...