Fake news is not news you disagree with -- it is content generated by non-news organizations to drive eyeballs to ads (e.g., clickbait) or to spread false information (rumors, conspiracy theories, junk science, and propaganda, for example).
1. Websites created to look like familiar mainstream news sites, e.g. "Boston Tribune."
2. Advertisements designed to look like news stories: "native advertising".
Look for a corporate logo or a tiny statement indicating Paid Post, Advertisement, or Sponsored by.
3. Satirical news (e.g. The Onion)
Fake news is not new. Rumors, urban legends, and tabloids are potential examples of fake news and many times they can be based on a kernel of truth. This makes finding out what is real and what is 'fake' especially difficult. Listen to another component of the fake news phenomenon and how money plays a role in relaying misinformation.