The European Court of Human Rights is like a big group of grown-ups who work together to make sure that everyone's rights are being protected in Europe. Just like how your parents and teachers tell you that you have certain rights, like the right to play and learn safely, there are also rights that every person should have, like the right to speak freely or be treated fairly by the police.
But sometimes, these rights are not always respected, even by grown-ups like the government or the police. This is where the European Court of Human Rights comes in. People can tell them when they think their rights have been violated and the court will listen to them and decide if they are right or not. If they are right, the court can also tell the government or the police what they did wrong and help make sure that it doesn't happen again.
So, the European Court of Human Rights helps make sure that everyone's rights are being respected and that everyone can live happily and safely in Europe.