When you upload a file to Alfresco using the File Picker, you will get the following fields to be completed. Some are auto-filled, and some will open up further options as required.
When you select the file to upload, the Title field will auto-fill, and there are two other fields to complete. If the content was created by your organisation, then there are no further fields to complete. Done.
Should the content belong to someone else, then you select ‘Third party’, and further information needs to be completed.
See the attached document for further details.