Consider your source's credibility. Ask these questions:

Contributor/Author

Has the author written several articles on the topic, and do they have the credentials to be an expert in their field?

Can you contact them? Do they have social media profiles?

Have other credible individuals referenced this source or author?

Book: What have reviews said about it?

Publisher

What do you know about the publisher/sponsor? Are they well-respected?

Do they take responsibility for the content? Are they selective about what they publish?

Take a look at their other content. Do these other articles generally appear credible?

Bias

Does the author or the organization have a bias? Does bias make sense in relation to your argument?

Is the purpose of the content to inform, entertain, or to spread an agenda? Is there commercial intent?

Are there ads?

Currency

When was the source published or updated? Is there a date shown?

Does the publication date make sense in relation to the information presented to your argument?

Does the source even have a date?

Reproduced

Was it reproduced? If so, from where?

If it was reproduced, was it done so with permission? Copyright/disclaimer included?