The ESCAPE acronym -- Evidence, Source, Context, Audience, Purpose, Execution -- provides a useful framework when considering whether a source is credible or not. No single question here stands on its own -- it's important to consider the full picture of what you're looking at. Don't forget that a librarian or your professor can always help you distinguish between what's credible and what's not.
NewseumED (2020). E.S.C.A.P.E. Junk News. NewseumED. https://newseumed.org/tools/lesson-plan/escape-junk-news