It doesn't matter who you are or where you live.
Domestic violence goes on in every type of street, in any kind of house and in all sorts of families.
It's often kept secret because people are too frightened or embarrassed to tell anyone else.
In most cases, domestic violence is a carried out by a man against a woman.
Hundreds of thousands of children in the UK hear or see one of their parents beat or threaten the other.
It can be a really frightening experience.