android中.tagForChildDirectedTreatment（true）和.setIsDesignedForFamilies（true）之间的区别是什么

我想在我的儿童应用程序中添加一些广告，我遇到了以下示例

final AdView adView = (AdView) findViewById(R.id.adView);
Bundle extras = new Bundle();
extras.putBoolean("is_designed_for_families", true);
AdRequest adRequest = new AdRequest.Builder()
            .addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
            .addNetworkExtrasBundle(AdMobAdapter.class, extras)
            .tagForChildDirectedTreatment(true)
            .build();
    adView.loadAd(adRequest);


    final AdView adView = (AdView) findViewById(R.id.adView);
    AdRequest adRequest = new AdRequest.Builder()
            .setIsDesignedForFamilies(true)
            .setRequestAgent("android_studio:ad_template").build();
    adView.loadAd(adRequest);

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但是这两者之间有什么区别呢？这和记忆有关吗

通过应用.tagForChildDirectedTreatment（true）标记，应用程序将显示与添加相关的子项