The Web has little quality control and critical evaluation of internet sites is crucial. Some criteria to use when examining a Web site are:

Authority

• Is the document author or site sponsor clearly identified?
• Does the site provide contact information for the author or sponsor?

Objectivity or clear disclosure of advocacy

• Is the site's purpose clear (for example, to inform, entertain or persuade)
• Is the site explicit about declaring its point of view?
• Does the site indicate whether it is directed toward a specific audience?

Coverage

• Are the topics covered by the site clear?
• Does the site exhibit a suitable depth and comprehensiveness for its purpose?
• Is sufficient evidence provides to support the ideas and options presented?

Accuracy

• Are the sources of information stated?
• Do the facts appear to be accurate?
• Can you verify this information by comparing this source with other sources in the field?

Currency

• Are the dates included in the website?
• Is the information current, or at least still relevant for the site's purpose? For you purpose?

Criteria list taken in whole from:
Ramage, Bean and Johnson. The Allyn and Becon Guide to Writing. 5th Ed. Customized for Marquette University. Boston: Pearson Education, Inc., 2009. Print.