Another way to measure the impact of outdoor advertising on hotel bookings is to use geofencing and location-based services. Geofencing is a technology that allows you to create a virtual boundary around a specific location, such as your outdoor ad or your hotel. When a potential guest enters or exits the geofenced area, you can send them a targeted message, such as a push notification, an email, or a text message. Location-based services are applications that use the location data of a user's device, such as GPS, Wi-Fi, or Bluetooth, to provide relevant information or offers. For example, you can use a location-based service to show your hotel's availability and rates to nearby users who are searching for accommodation. By using geofencing and location-based services, you can measure how many people are exposed to your outdoor ad, how many of them engage with your message, and how many of them book your hotel.