To help prevent accidental or unwanted in-app purchases on Android devices, you can enable password protection through your Google account.

Here's how:

1. Open the Google Play Store app.
2. Tap your profile icon (top right) and go to Settings.
3. Select Authentication ➜ Require authentication for purchases.
4. Choose the option that best fits your needs (e.g. for all purchases, or every 30 minutes).
5. Confirm your selection by entering your Google password, fingerprint, or screen lock.

For more detailed instructions, visit:
👉 support.google.com