How should I start a process defined with a Document or folder start event?

Summary

How should I start a process defined with a Document or folder start event?

Content

Hi,

 

I have a process that starts with a document/folder start event.The process automatically starts when someone uploads a document (or folder of documents) to a chosen document folder in content and experience cloud service. I dint know how to do with the document/folder start event??? Can anyone knows please help???