The index compiles news sites with low factual-reporting levels, as determined and documented by Media Bias/Fact Check.

Each site in the index links to its MBFC review and to a fact-check search of its articles. The goal is to give researchers a more complete, current, and accurate dataset of sites that spread mis/disinformation, which will lead to more accurate disinformation research. See The Iffy Evolution for the history of this project and its Poynter past.