One way to evaluate a source of information is to apply the CRAAP Test developed at Cal State University at Chico. Use the initials to remind you to evaluate your source in terms of:
Currency - When was the information published? What time period is the information about? Do you need this information to be up to date?
Relevancy - How useful is this information to you? To what breadth and depth is the topic covered?
Authority - Who provided this information? Is the individual or organization an expert on the topic?
Accuracy - Is the information backed up with sound evidence? Has the information been reviewed by others for quality?
Purpose or Point of View - Why was this information provided in this way? What point-of-view does the information source have about the topic?
You can view or download a rubric to help you evaluate information sources, called Thinking Critically about Web Information: Applying the CRAAP Test (Lamar State College Library).
The letters at the end of a Web address may provide hints about the owner of the website.