But does social media do more good than harm? Tech bosses are being questioned by politicians in the USA over failings to protect children online.
Accused: ‘Your product is killing people’
Tech wreck: Senator Lindsay Graham of South Carolina accused Mark Zuckerberg of having blood on his hands. Glossary
Abusive - Insulting, offensive or cruel.
Senate - The upper chamber of the Congress that - along with the US House of Representatives (lower chamber) - comprises the legislative branch of the US government. Each of the 50 US states is equally represented by two senators, regardless of its population size.
Allegations - Claims of wrongdoing.
Restrict - Put a limit on.
Monitor - Watch over.
Algorithm - Any set of rules followed by a computer. In the context of social media, “the algorithm” refers to the intelligent AI that learns the interests of the user and presents them with posts that it thinks will interest them.