The exact tasks can vary by company, but typically include:
Cleaning & tidying the office, pantry, meeting rooms, and desks.
Serving tea, coffee, or water to staff and visitors.
Delivering documents or files within the office or to nearby locations.
Photocopying, printing, and scanning papers when needed.
Receiving and sending mail or couriers.
Buying small office supplies from nearby shops.
Helping in simple office errands that don’t require specialized skills.