Primary sources can be:
A primary source is generally:
A secondary source, on the other hand:
Whether a source is primary or secondary depends on the context of your research question. Sometimes what we might think of as a secondary source becomes a primary source, depending on how you are using it.
Primary sources connect your research and writing directly to your topic: you can use them to make your own interpretations and come to your own conclusions.
Using primary sources, you can interact more directly with what you are researching, and form assertions based on primary evidence.