With Google’s measurement protocol, you can send data to the Google Analytics server from any device and system with an internet connection. So, for example, you can send data from your cash counter machine and measure your offline conversions. However, you’ll need to format the data according to Google’s measurement protocol to enable this interaction. Without it, you won’t be able to send data to Google Analytics.
The measurement protocol can help in useful in several ways:
Moreover, the measurement protocol is beneficial for implementing cross-device tracking.