Secondary information is made up of accounts written after the fact with the benefit of hindsight. Therefore, secondary information interprets and evaluates primary information.
Because secondary sources are written with the benefit of hindsight and interpretation, they are useful at helping you understand your topic and seeing what scholars and other experts have to say about it.
Unless otherwise instructed by your teacher, you'll probably want to use a variety sources to help you gain a complete understanding of your topic. Sources of information generally fall within three categories.These categories are Popular, Substantive, and Scholarly (or Peer Reviewed). To use them skillfully you need to be able to identify them and understand their differences.
Watch the brief video below for more information: