There are a variety of source types that you may encounter when working on your research for an assignment. The differences between these source types varies such as the depth of topic coverage, intended audience (e.g. academic, general), and purpose. Consider what source type will provide the information you need:
Latest information on a current event?
Current research on the topic or issue?
Opposing perspectives for an argument?
Overview on the topic?
Reminder: always review the assignment for any source requirements (e.g. age of source, type of source).