Google AdMob allows many developers around the world to display ads in their apps and generate revenue, but its strict monitoring makes it easy for accounts to be restricted or even blocked due to invalid traffic. Developers need to pay special attention to account status and delivery. If restrictions occur, you can refer to the following reasons and solutions.

Ⅰ. Reasons for invalid traffic
1. Click on the ads yourself
Developers are not allowed to click on the ads placed in their own applications. The resulting clicks and traffic will be judged as invalid traffic.
2. Improper advertising location
Placing functional buttons (such as play, download, navigation buttons or applications) and website content (such as images that appear to be directly related to the advertisement) near the advertisement. This layout can easily cause users to accidentally click on the advertisement and is likely to be judged as inducing accidental clicks and violating the regulations.
3. Encourage clicks
It is also against the rules to use money, free downloads, free use and other incentives to encourage users to click.
4. Repeated click
Some repeated clicks on ads are often clicks that bounce quickly and fail to generate meaningful interactions. They may be frequent accidental clicks or robot clicks. These low-quality traffic can also be easily judged as invalid traffic.
5. Small amount of page content
There is a certain risk in placing advertisements on pages or apps with little or no content, because pages or apps that cannot provide users with high-quality content often have high bounce rates, short dwell time, and low interaction, and are also prone to generating or being judged as invalid traffic.
6. Abnormal traffic data
If some important indicators (such as eCPM, CTR, etc.) are significantly higher than the average, the platform will consider the data to be inflated and determine it as invalid traffic.
7. Account Linking
In order to share risks, test and increase revenue, it has become the norm to use multiple accounts at the same time, but this creates risks. When monitoring, the platform may consider that accounts using the same IP or performing similar behaviors are related or even suspicious.
At the same time, all accounts in the Google ecosystem (such as Google, Google AdSense, etc.) are related. If one account has a problem, other accounts can easily be implicated.

Ⅱ. Solution
1. Optimize ad placement
Reasonably control the layout of page content and advertisements, distinguish advertisements from other content, and avoid accidental clicks.
2. Use test ads
It is generally unavoidable to repeatedly play and display ads during testing. At this time, using test ads, test IDs, or adding test devices can effectively avoid repeated clicks and repeated ad displays in the test scenario, thereby preventing the generation of abnormal and invalid traffic.
3. Monitor data regularly
Regularly check the advertising status and various data indicators to troubleshoot problems in a timely manner.
4. Set click/impression limits
Set limits on the frequency of ad displays and clicks to prevent robots or some users from maliciously clicking and viewing ads repeatedly.
5. Anti-correlation
According to the association problem mentioned above, whether it is multiple accounts on the same platform or multiple accounts on multiple platforms, you must pay attention to preventing association. You can use IPFoxy to provide an independent IP for each account. A large number of pure IPs can easily meet the needs of multi-account management and use, and also have quite good performance in terms of connection stability and speed, which can greatly reduce the risk of association.

Ⅲ. Final Thoughts
There are many possible reasons for invalid traffic in Google AdMob. Timely troubleshooting and using reliable network tools can effectively prevent and solve the problem.