Currency: The timeliness of the information. When was the information published or posted? Is the information current or out-of date for your topic?
Relevance: The importance of the information for your needs. Does the information relate to your topic or answer your question? Who is the intended audience? Is the information at an appropriate level (i.e. not too elementary or advanced for your needs)? Have you looked at a variety of sources before determining this is one you will use? Would you be comfortable using this source for a research paper?
Authority: The source of the information. Who is the author/publisher/source/sponsor? Are the author’s credentials or organizational affiliations given? Does the URL reveal anything about the author or source? Think .com, .edu, .gov, .org and .net. Note: Now domain names are growing to include complete customization.
Accuracy: The reliability, truthfulness and correctness of the content. Where does the information come from? Is the information supported by evidence? Has the information been reviewed or refereed? Can you verify any of the information in another source or from personal knowledge? Does the language or tone seem biased and free of emotion? Are there spelling, grammar, or other typographical errors?
Purpose: The reason the information exists. What is the purpose of the information? to inform? teach? sell? entertain? persuade? Do the authors/sponsors make their intentions or purpose clear? Is the information fact? opinion? propaganda? Does the point of view appear objective and impartial? Are there political, ideological, cultural, religious, institutional, or personal biases?
(via Meriam Library at California State University, Chico: http://www.csuchico.edu/lins/handouts/eval_websites.pdf)