What purpose do primary documents serve in history? How has the world of primary documents changed in the past two decades? What impact will this have on the "telling" of history?

The purpose do the primary documents serve in history is that it’s document of events, stories, news, and etc. That published or happened during that time. People used primary document because it's the first source and we can't go back in the past. Without primary source we in the present wouldn't have the proof of where the document came from. Historians use it to analyze the events in the past. The world of primary documents changed in the past two decades by helping people find the right source of information. Why would people want to get information that is not the primary source. Sometime, when it’s not the primary source, people can make up stuff and give you the wrong set of information and details. The impact that this have on telling of history is that primary source is really important. It is basically a document revealing personal information that are contained in news, books, articles, and etc.