What is fake news?

Fake news is a term you hear more and more, but what is it exactly?

Fake news is the spreading of lies, falsehoods and half-truths through the press. These are often difficult to distinguish from facts, especially when fake news and factual news are mixed in a news article.

Fake news can have a very big impact on a social debate because it makes any discussion very difficult.
On the internet, you can find news sites that package untruths so professionally that they appear very credible.