A primary source is any item from the time period of the event that you're looking at. You will probably be using either social media, newspapers, NGO or government documents.
Primary sources tell the story as experienced by eyewitnesses or others near to events. These sources are invaluable to researchers because they help to depict "what actually happened," or at least what those who were there say they experienced. Primary sources can include photographs, interviews, novels, speeches, letters, statistical data, material artifacts, or treaties, all of which offer researchers evidence with which to reconstruct the past.
Some questions you may want to keep in mind when examining a primary source are:
• When, where, and why was it written?
• What do you know about the author's role in society? The author's worldview?
• For whom was the document intended? What was its purpose?
• How typical was this opinion for the period?
• Is there evidence that corroborates the author's depiction?
• What is the context of the document?
Social media is a good resource for primary resources, however there are some challenges.
Looking at newspaper coverage from the time period is a good way to find primary resources.
Government documents and reports can be be very useful. Governments may cover an event in their territories in a different way then external organizations.
Generally defined as: "nonprofit entities independent of governmental influence (although they may receive government funding)."
Examples of NGOs (not a complete list):