In college, you will often be asked to find peer-reviewed sources. This brief video gives an overview of the peer-review process.
In addition to popular and scholarly sources, sources are also categorized into Primary, Secondary, and Tertiary sources. This video describes the differences between those types of sources.
Most of the sources that you will use for your academic work will be scholarly, but popular sources like news articles or other websites may be useful, as well. Any source can be useful if it fits and information need. As you evaluate your sources, consider assessing them using the five W's, which will help you decide if a source is appropriate to your task, relevant, and useful.
