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A device ID is a unique alphanumeric code that is assigned to every individual device as a way of differentiating from other devices. Let’s learn more about this unique code and its importance in the way digital marketing works.

What is Device ID?

In the context of the current digital world, where the Internet of Things (IoT) is incorporated in every facet, device IDs are a crucial element. In simple terms, DeviceID meaning refers to a unique string of numbers and letters assigned to every single device, as a means of distinguishing it from others.

This includes every smartphone, laptop, tablet, PC, or any other computing hardware. Such as, even in a mobile device ID, what is device ID in Android phones will be different from that of iOS phones. This identifier code is stored on the device and can be retrieved to identify the system.

Importance of Device IDs

The most basic reason why these IDs are important is that they help you identify your users by keeping track of their devices. You can not only identify their trends and behaviors online, which can help you to customize their experience but also enable you to segregate them into cohorts based on specific characteristics. As a result, these phones IDs help you get a much clearer picture of who your users are and how you will need to approach them through your marketing tactics.

In the case of marketing using a third-party platform, the process of how to track device ID of your users becomes easier as you can also get information about user responses to your ads and other collateral. You can also use these to further find out user behavior post-installation or interaction. This way, you can enhance subsequent user experience with ease.

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Different Types of Device IDs

To better approach users, a customized strategy Android unique device ID or an iOS unique ID is bound to be more effective.

  • In the case of iOS users, a device ID is called an “Identifier for Advertisers” (IDFA) and it comprises 8 digits, followed by a dash, and then 12 digits divided into 3 sets. However, it is crucial to note that since the release of iOS 14.5, users can opt out of sharing their IDFA.
  • In Android systems, the code is called an “Android Advertising ID” (AAID), and it is a string of 32 alpha-numeric characters. However, much like how iOS gives its users the option to opt out of sharing their IDFA, users can choose to reset their AAID if they feel their privacy has been compromised.


In this way, the importance of a Device ID cannot be overstated in the realm of digital marketing. By allowing you to identify and differentiate your users based on their iOS and Android device IDs, they serve as invaluable tools that can help you enhance your marketing efforts. However, with rising privacy concerns, users have the option of not sharing their IDs with you. So, it is ideal to approach using them with a balanced perspective, leveraging their efficiency responsibly to deliver personalized experiences.