A User-Agent is a type of technical information that tells a website or ad system what kind of device or app someone is using like an iPhone, Android phone, or smart speaker.
People often use more than one device, or their apps update and change how that information looks. If third-party tracking systems can’t tell that all those devices belong to the same person, the data might look confusing as if there are multiple users instead of one.
This can cause reporting errors, such as showing ads in the wrong location or marking real activity as fraudulent traffic. Making sure third parties can recognize multiple user agents tied to one listener helps keep your campaign data accurate and trustworthy.
