It’s important to note that only Dynamic URL QR Codes are detectable by Google. Other types of QR Codes (PDF, Social Media, Video, etc) will not send tracking information to Google Analytics.
Follow the steps below to add your Google Analytics ID.
Log in to your account.
Select Account - My Account.
Enter your Google Analytics UID in the corresponding field.
Your Google Analytics(GA) ID can be found in your GA account under Admin - Property Settings - Tracking ID. See the image below.
Once you have added your GA UID, you can view your QR Code metrics in Google Analytics. To do so:
log in to your Google Analytics account.
navigate to Acquisition - All Traffic - Source/Medium.
A QR Code made with QR Code Generator PRO is always shown as QRCG under Source/Medium.