Housekeeping, what are the responsibilities of housekeeping?

The scope of work of back office positions in each unit is slightly different, mainly including general office affairs, cleaning, organizing, answering phone calls, contacting courier companies, mailing company documents or letters, meeting chores, and daily routine in the conference room Organizing, cleaning, etc. That is to say, some tasks that are not designated by dedicated personnel within the unit. In some departments, the back office staff are called assistants, which are not back office duties in the traditional sense.