Android Advertising ID: what it is and how to manage it

Every time you open a new application on your smartphone, or simply navigate through web pages, a complex data exchange process occurs in the background. Many users do not even suspect that their device has a unique digital “passport” created specifically for advertising networks. This code allows marketers to build a detailed profile of your interests without knowing your name or phone number.

Understanding how this system works is the first step to taking back control of your digital privacy. In this article, we will look in detail at what is an advertising identifierwhy it was introduced by Google and how you can limit the collection of information about your actions. Knowing these mechanisms will help you make using your gadget safer and more comfortable.

The issue of privacy in the era of big data is becoming increasingly acute. Although it is difficult to completely avoid tracking in the modern ecosystem, proper configuration of device settings can significantly reduce the amount of information transmitted. Let's dive into the technical details of the targeted advertising system on the platform Android.

The essence and purpose of a unique advertising code

Advertising ID (GAID) is a sequence of characters assigned to each Android device. Unlike a permanent IMEI or serial number, this code can be changed at any time. The main goal of its implementation was to create a balance between the interests of advertisers and users' rights to privacy.

Previously, application developers used immutable hardware identifiers to track users. This meant that even after resetting the settings or deleting the application, advertising networks continued to “recognize” your phone. Google ID for advertising solved this problem by giving the user the opportunity to reset the current number and start the story again.

The system works on the principle of anonymization. Advertising networks do not see you personally, but a set of preferences tied to a specific set of characters. If you frequently search for recipes, you will be shown ads for kitchen tools. If you play strategy games, the algorithms will suggest new games of the genre.

⚠️ Attention: Resetting your ID does not instantly delete data already collected about you from ad network databases. It only breaks the connection between the old behavior history and the new code, making further profiling difficult.

Technically, this identifier is a standard UUID (Universally Unique Identifier). It is generated by the operating system and can be read by any installed application that has the appropriate permissions. However, its use is strictly regulated by policy Google Play Services.

Where to find and how to view the current number

Users often wonder where exactly this parameter is hidden in the depths of the system. Finding it is quite easy, since Google has made this setting a relatively accessible menu. The path may differ slightly depending on the version Android and the manufacturer's shell (for example, One UI from Samsung or MIUI from Xiaomi).

In most cases, the algorithm of actions is as follows. You need to open the main settings of the device and find the section dedicated to Google services. This is where the keys for managing privacy and advertising preferences are stored.

Next you should go to the advertising menu. The interface may offer different name options, but the essence remains the same - managing the advertising identifier. Here you will see a long line of numbers and letters separated by hyphens.

• 📱 Open the menu Settings on your smartphone.
• 🔍 Find the section Google or Google Services.
• 📢 Select item Advertising or Ads.
• 👁️ Click on Advertising ID, to see the code.

On some devices, the path may go through the “Privacy” or “Security” section. If you cannot find the item you need, use the built-in search in settings by entering the query “advertising”. This is the fastest way to get to the desired menu, bypassing complex structures.

Reset function and generation of a new identifier

One of the key functions for which this mechanism was introduced is the ability to reset. Clicking the “Reset Advertising ID” button causes the system to generate a completely new random sequence of characters.

Why does the average user need this? Imagine a situation where the algorithms incorrectly determined your interests. You begin to be intrusively offered advertisements for products that do not interest you at all. Resetting the ID helps to “reset” these assumptions for advertising networks.

The process of generating a new code occurs instantly and does not require a device reboot. The old ID becomes invalid for future requests, although applications that have already received it previously can store it in their local logs for some time.

Action: Click the "Reset Advertising ID" button
Result: Generating a new UUID
Status: The old ID is marked as inactive for new ones queries

It is important to understand that frequent ID resets can lead to advertising becoming less relevant, but also less intrusive in terms of repeating the same banners. For those who value variety of content, this may even be a plus.

Technical details of generation

The new identifier is created using a cryptographically strong pseudo-random number generator. The probability of a new code matching an old one or the code of another device tends to zero.

Completely disabling personalized advertising

If you do not want your actions to be used to select advertisements, the Android system provides the opportunity to completely opt out of personalization. This does not mean that advertising will disappear completely - you will still see ads, but they will be random and not tied to your profile.

To activate this feature, you need to find a switch called “Turn off ad personalization” or similar. Once activated, the advertising identifier is no longer used to create an interest profile, although technically it continues to exist in the system.

It is worth noting that some application developers may ignore this setting if their applications are not distributed through the official store. Google Play. Therefore, it is important to download software only from trusted sources that follow privacy policies.

⚠️ Warning: Disabling personalization may result in you seeing low-quality ads or potentially dangerous offers, as relevance filters will not work.

This setting is synced with your Google account. If you sign in to the same account on another device, the preference to disable personalization may apply there as well, providing a consistent level of privacy across devices.

Comparison with other tracking methods

To better understand the place of the advertising identifier in the security ecosystem, it is useful to compare it with other methods of device identification. The table below shows the main differences between GAID, IMEI and Cookies.

Identifier type	Modifiability	Access level	Main purpose
Advertising ID (GAID)	The user can reset	Applications and browsers	Targeted advertising
IMEI	Unchangeable (hardware)	System and telecom operator	Online identification
Cookies	Can be cleared in the browser	Websites	Tracking on the web
MAC address	Partially hidden in new OS	Wi-Fi routers	Network connection

As can be seen from the table, advertising identifier is the most flexible tool from the user's point of view. While IMEI is almost impossible to change without breaking the law and breaking the device, GAID was created specifically for user management.

However, don't think that resetting GAID makes you invisible. There are “device fingerprinting” methods that analyze a set of parameters: OS version, screen model, battery level, list of fonts. Together, this data can highly accurately identify a device even without a unique ID.

The impact of Android 12 and higher updates on privacy

With the release of new versions of the operating system Android, starting with version 12, Google has tightened its data handling policies. There's now a "Approximate Location" feature and stricter control over app access to IDs.

Now apps can't easily read an advertising ID in the background without the user's knowledge. The system requires explicit confirmation of actions or limits the frequency of requests. This significantly reduces the possibility of hidden profiling.

In addition, new versions of Android now allow you to view which applications accessed your advertising ID over the last 24 hours or 7 days. This transparency allows you to identify suspicious software that abuses data collection.

• 🛡️ Control of background activity of applications has been tightened.
• 📊 An access log to the advertising ID has been added.
• 🚫 The transfer of ID to applications unrelated to advertising has been limited.

Users are advised to check this log regularly. If you see that a simple flashlight or calculator requests access to advertising data, this is a serious reason to remove this application and find a replacement for it.

⚠️ Attention: The settings interface and the names of menu items may change with system updates. If you do not find the described items, check the official Google Help for your version of Android.

Frequently asked questions (FAQ)

Will resetting the advertising identifier remove all advertising on the phone?

No, resetting the identifier does not completely disable advertising. It only breaks the connection between your browsing history and your current device. You will continue to see ads, but they will become less relevant to your interests and will be selected randomly.

Can apps recognize my real advertising ID after a reset?

Apps installed on the device can only recognize the current active ID. After the reset they will receive a new code. However, the old data that the application had already sent to its servers before the reset remains in the advertising network database.

Does disabling personalization affect the operation of free applications?

Formally, no, the functionality of applications should not change. However, many free services exist thanks to advertising. By disabling personalization, you reduce the developer's income from your device, which in the long run may encourage them to implement paid subscriptions.

Is the advertising ID the same for all apps on the phone?

Yes, by default, all apps on the same device see the same advertising ID. This allows advertising networks to build a single user profile across different apps. Some browsers may use their own isolated identifiers.

How often is it recommended to reset the advertising identifier?

There is no single standard. To balance privacy and convenience, it is recommended to reset every 1-3 months. If you install many new applications or actively change your areas of interest, you can do this more often.