How important is report writing in administration activities?

I would recommend it as the back bone because report writing will help you to research, observe and evaluate. And these three actions can avoid any sort of mishap in future which have happened in the past.

A number of reports are written/prepared in organisations which play a very important role in the next phase of projects, and activities, like feasibility reports, monitoring and evaluation reports, periodical progress reports, medical reports, and technical reports etc. So there is no question on the importance of report writing. The main focus is/should be on the skill of report writing.