When you find a source of information for your research, take a few moments to consider the quality and reliability of that source.
This can apply to any type of information (books, articles, web sites), but it can be very important with web sites since it is so easy for anybody to publish information online, regardless of their qualifications or trustworthiness!
The CRAAP test was originally created by California State University-Chico's Meriam Library. You can see their original worksheet here: http://www.csuchico.edu/lins/handouts/eval_websites.pdf.
Is the information that you found appropriate to your needs?
Does it help to answer your research question?
Does it make sense to use the source, or would it be more appropriate to use something more scholarly or more oriented to everyday consumers?
Can you find a date showing when the information was published?
If so, does the age of the information affect the accuracy?
The importance of currency often depends on the type of information you're looking for and how it will be used. Timeliness is particularly important in science, technology, medicine, and anything that could have significantly changed over time.
Where did this information come from?
Do you know the name of the person, or at least the organization responsible for the information?
Is the source an expert on the information?
Do you trust the source?
Can you verify this information from another source?
Does this resource cite their sources, either formally (works cited) or informally?
Do you see obvious errors (bad links, spelling and grammar errors)?
Does it appear to be a professionally published resource?
What is the purpose of this source?
Does it want to sell you or convince you of something?
Is it meant for entertainment only?
Does it seek to inform, provide factual, unbiased information?