What is a fake news?

There is no clear definition of fake news. However in general a fake news is a false or misleading information spread across media. Fake news in social media may be used to attract visualisations and likes so the person posting gets returns in higher visibility and popularity. Sometimes, fake news may also be used in a more architected manner in marketing campaigns with the aim of damaging reputations of brands or persons or interfere with mass opinion in democratic countries for example during elections