As a researcher, you will navigate a vast amount of information from a variety of sources, including but not limited to books, journals, and the Internet. Not everything you find is appropriate to use in your research paper.
You should aspire to become an expert on the topic of your choice, as a researcher, so you need to consider whether the information you are finding is reliable, valid, authoritative, relevant, and current.
The CRAAP Test consists of basic evaluation criteria you should ask to determine whether the information you have found is reliable.
Currency: The timeliness of the information.
Relevance: The importance of the information for your needs.
Authority: The source of the information.
Accuracy: The reliability, truthfulness, and correctness of the informational content.
Purpose: The reason the information exists.
The above list is not static or complete. Different criteria will be more or less important depending on your situation or need.
The Meriam Library at California State University, Chico has put together this list of questions.