After coming to terms with the fact that its platform contributed to the spread of fake news during last year's presidential election, Facebook has implemented a few features and regulations aimed at combating the problem. It trained its algorithms to deprioritize fake news and clickbait as well as articles shared by individuals who post at extremely high frequencies. It cut off fake news sites' ad revenue and blocked advertisements created by Pages that share misinformation. Facebook also began introducing fact checked articles and compiling related articles that cover a Trending topic. Some of Facebook's efforts appear to be having a positive effect -- the site deleted tens of thousands of fake accounts ahead of the recent German election. But there have also been some missteps. Facebook spread quite a bit of fake news following this week's massacre in Las Vegas.

Facebook says this information button test is just getting started. "We'll continue to listen to people's feedback and work with publishers to provide people easy access to the contextual information that helps people decide which stories to read, share, and trust, and to improve the experiences people have on Facebook," it said in a statement.