A questionable source exhibits one or more of the following: extreme bias, consistent promotion of propaganda/conspiracies, poor or no sourcing to credible information, a complete lack of transparency, and/or is fake news. Fake News is the deliberate attempt to publish hoaxes and/or disinformation for profit or influence
@Dreamer Source having high factual reports and fact checking their sources instead of just posting their agenda? https://mediabiasfactcheck.com/ is usually pretty good even if it's not perfect
"Media Bias/Fact Check rarely conducts original fact checks as many other sources are faster and do a better job. We primarily rely on fact-checkers affiliated with the International Fact-Checking Network (IFCN)."
Writers at the Poynter Institute, which develops PolitiFact, have stated that "Media Bias/Fact Check is a widely cited source for news stories and even studies about misinformation, despite the fact that its method is in no way scientific." In 2018, a writer in the Columbia Journalism Review described Media Bias/Fact Check as "an armchair media analysis" and characterized their assessments as "subjective assessments [that] leave room for human biases, or even simple inconsistencies, to creep in".