Information evaluation is a critical part of the research process. Applying a set of standards to information sources will help you judge their credibility and relevancy.
The evaluation process will depend on the purpose for which you are using the information. When researching for an academic project or looking for information to guide an important decision, you will want to carefully scrutinize information sources. You will also want to compare sources and draw on your own knowledge in your analysis of the topic.
Briggs Library's Research 101 guide describes how to use information about source types and using the criteria of currency, relevance, authority, accuracy, and purpose to evaluate sources.