As with all information, you should carefully evaluate the sources of information you choose to use. For a basic review, remember your ABCDs. Considering these aspects in regards to your need can help you determine if you should use this source.
Author. Who wrote the information and why? Where is it published?
Bias. Does the author have a conflict of interest or reason to unfairly weigh all the options?
Content. Are there grammatical mistakes? Is the information well structured? Do the conclusions match the data presented?
Date. Do you need historical information or current research?