Received email from Google :

Hi developers at Starikov Mark,

After review, (application name), (application package),
has been removed from Google Play due to a policy violation. This app
won’t be available to users until you submit a compliant update.

Issue: Violation of Usage of Android Advertising ID policy and section
4.8 of the Developer Distribution Agreement

Google Play requires developers to provide a valid privacy policy when
the app requests or handles sensitive user or device information.
We’ve identified that your app collects and transmits the Android
advertising identifier, which is subject to a privacy policy
requirement. If your app collects the Android advertising ID, you must
provide a valid privacy policy in both the designated field in the
Play Console, and from within the app.

Next steps: Submit your app for another review

Read through the Usage of Android Advertising ID and User Data
policies, as well as the Developer Distribution Agreement, and make
appropriate changes to your app. If you decide to collect sensitive
user information, be sure to abide by the above policies, and include
a link to a valid privacy policy on your app’s store listing page and
within your app. Make sure that your app is compliant with all other
Developer Program Policies. Additional enforcement could occur if
there are further policy violations. Sign in to your Play Console and
submit the update to your app. Alternatively, you may opt-out of this
requirement by removing any requests for sensitive permissions or user
data.

If approved, your app will again be available with all installs,
ratings, and reviews intact.

If you’ve reviewed the policy and feel this removal may have been in
error, please reach out to our policy support team. One of my
colleagues will get back to you within 2 business days.

Thanks for helping us provide a clear and transparent experience for
Google Play users.

Regards,

Jaime

The Google Play Team

They checked my app published on Google Play and found that I am using Banner Ads ID but do not provide Privacy Policy .

The problem is this:

1. I have never written a privacy policy and have no idea that
   write in it how to arrange, etc.

2. URL must be posted. I don’t have my own website or blog. Is it possible to use the README file on GitHub , or is it easier to do it somehow?

3. And also needs to be added to the application. Where exactly is it needed
   add? When you start the app for the first time? Somewhere in the settings or
   in the About the Application?

Answer 1, authority 100%

If you have never written a privacy policy, you can use a free tool like Privacy Policy Generator .

This generator takes into account services such as Google Play Services,
AdMob, Fabric, Crashlytics, Firebase Analytics and others.

You can upload the policy to a separate repository, namely README.md on GitHub . And also based on this file, additionally create a static site in the repository settings using GitHub Pages , but this is not necessary.

The main thing is to be able to point the URL to the policy.

1. After all, link to the privacy policy in the Google Console .
2. Create About the Application section and add a link. Also, if you have a registration in the application, then you must first give the opportunity to familiarize yourself with the policy, i.e. provide a link under the registration button.