A characteristic of fake news is that it is distributed rapidly and widely through social media, usually by unsuspecting internet users.
It is the global popularity of Facebook, Twitter and Google that has allowed phony news to flow into people's homes so easily, to be reposted so rapidly, and to maintain anonymity for the originator.
You have probably seen how it works. You "like" some news-looking article a friend posted on your Facebook site, and immediately a lot of similar posts show up. Advertisers paid to get those to you.
The reason people produce fake news websites is easy -- it's mainly for the money.
Internet-savvy teens in Macedonia tried different topics and discovered that Facebook users are more likely to share a fake news story about a supposed health cure or one that is pro-Trump.
So the teens set up the false news-looking websites, crank out the stories, and get paid per share -- up to $3000 a day.
But anyone can produce fake news. One example is the American who set up a website with the trusty name of ChristianTimesNewspaper, wrote a phoney anti-Hillary Clinton story and was surprised to earn $1000 from the huge number of hits he got in a week.
So he continued putting out false anti-Clinton stories to pay off his student loan.
Others do it for the thrill of seeing how many people they can con and getting extra thrills for conning the real media.
Kiwis were the subject of this type of fake news when some reports said the entire country was evacuated after the Kaikoura earthquakes.
There was also a flood of YouTube videos purporting to be of live coverage of the quake damage, except they were shot in clear daylight -- when Kiwis know the quake was at midnight.
Also, some of the fake news videos showed fleeing Kaikoura victims screaming in Chinese instead of English. Dead giveaway. YouTube removed them within two days.
I've seen fake posts spread by people who are educated but unfamiliar with news processes. They see a headline they like -- they want to believe -- and quickly hit the share button.
No attempt is made to verify the veracity of the story.
Columbia University research found 59 per cent of people who "liked" a Facebook news story never clicked on to it to read the actual article.
Simply from a headline, they spread fake news.
News consumers have a responsibility to support real news and back those journalists who strive to report truthfully and fairly.
They should try to stem the flow of fake news by not sharing or liking a Facebook post before checking out its validity. One of the best ways to check is see if the story is reported by two or more trusted news sites.
New Zealanders benefit from "real news" produced by good journalism, whereby we know what is really going on in the world.
Media-savvy news consumers can tip the scales away from fake news by giving a compliment and credit to news stories that are well reported and accurate.
-Dr Catherine Strong is a senior lecturer at Massey University's School of Communication, Journalism and Marketing who specialises in issues on convergence media.