"Fake News" has several different meanings. This guide will focus on one: information which is presented in a deliberately or unintentionally misleading manner and/or with misleading or false facts while attempting to appear legitimate. The video below will help to define Fake News and how it spreads:
Source: TED-Ed
Currently, while 64% of Americans believe that fake news has caused confusion and more than a third believed that they encountered fake news on social media more than once a day, Americans are not especially good at spotting fake news when they see it. A viral, false story about the pope endorsing Donald Trump for president was found in one survey to be believed "somewhat" or "very" accurate by 64% of respondents! Source: Statista
Source: Flikr