Defamation is something where somewhere in the public there has been something said about you and it damages your reputation. So, for example it may be on Facebook, it could be on Twitter, it may be in the newspaper or on TV it could even be something that somebody says orally in front of other people and when that happens, if your reputation has been damaged what you can do is take a claim for damages but you can also take action to try and get an apology from the person and a retraction and usually that is the most effective thing to do which will resolve in a lot of cases where people take that opportunity of doing that