The Research Process
You wouldn’t wear a down parka on a hot day, right? And you wouldn't choose a raincoat full of holes. Information is the same way: some sources are better than others.
Evaluation is at the center of the process because you must evaluate both strategy and content at every stage. Evaluate for your own needs and interests, your assignment or task, and the topic itself.
Early on, consider whether you are using the appropriate tools and strategies for the information you need. Later, when you’ve identified specific sources, evaluate the content: is it appropriate, reliable and relevant?
No evaluation process is complete without considering whether the sources you found have answered all of your research questions. Review your research question or task to decide whether you need to continue your search.