Author
Who is the author?
Are they an expert in the field? An eyewitness? Is it a primary or secondary source?
Who are the publishers/researchers/fundraisers? Look for an “About Us” tab or similar.
Beware of anonymous authors or use of vague phrases like, “sources say”
Bias
Does the source cover multiple perspectives on an issue in a neutral manner?
OR does it seem like the author is trying to sell you something or convince you of something?
Content
Is the material relevant to your topic? Can you easily explain it to someone else?
Is the information supported by evidence? Was it evaluated or peer reviewed before publication?
Are there any spelling or grammatical mistakes?
Date
Is the information still current or has the information in your source become outdated?
For websites, check for broken links as an indicator if the page has not been maintained over time.