An autonomous driving vehicle that is a mobile unit according to this disclosure is a mobile unit configured to transport a user to a facility that provides services or commercial products and, at the same time, configured to perform an advertising activity for the services or the commercial products of the facility. The mobile unit includes a control unit configured to acquire data for providing a promotion in the mobile unit and is configured to provide a promotion in the mobile unit based on the acquired data. The promotion is related to the services and the commercial products at the facility.