Become familiar with the qualities of scholarly / peer reviewed journals, and recognize long-standing reputable newspapers, magazines, and news organizations. Doing so will provide you benchmarks for evaluating information, wherever you find it.
The graphic below is based on the more detailed CRAAP checklist (Currency, Relevance, Authority, Accuracy, Purpose), from the California State University, at Chico.
When using the Web, look at the top level domain identified by the URL:
The internet domain name can help users to make inferences about the authorship of the posted information.