What causes ANR in Android mobile ads?

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ANR (Application Not Responding) in Android mobile ads can have several causes:

1. Large ads: If the ad is too large, it may take a lot of system resources to display, causing the app to become unresponsive.

2. Slow network: If the network is slow, the ad may take a long time to load, causing the app to become unresponsive.

3. Low memory: If the device does not have enough memory to display the ad, the app may become unresponsive.

4. Blocking UI thread: If the ad is processing on the same UI thread as the app, it can cause the app to become unresponsive.

5. Code issues: If there are issues in the code of the ad or the app, it can cause the app to become unresponsive.