Backfill Ads

Overview

Backfill ads are alternative ads displayed when the primary ad fails to load. They help fill empty ad spaces when there’s insufficient ad inventory or network issues prevent ad loading.

Before You Start

Complete Backfill Prerequisites.

Installation

1. Podfile Setup

Add backfill ad dependencies to your Podfile:

Podfile

target 'YourApp' do
  # Adrop SDK
  pod 'adrop-ads'

  # Backfill Ad SDK
  pod 'adrop-ads-backfill'

  # ... other dependencies
end

After adding dependencies, run the following command:

cd ios
pod install

2. Info.plist Setup

Add the following configurations to your Info.plist.

GADApplicationIdentifier: Replace ca-app-pub-xxxxxxxxxxxxxxxx~yyyyyyyyyy with your actual AdMob App ID.
SKAdNetworkItems: Apple’s ad attribution framework, required for ad conversion tracking on iOS 14+.

View Info.plist Configuration

Info.plist

<key>GADApplicationIdentifier</key>
<string>ca-app-pub-xxxxxxxxxxxxxxxx~yyyyyyyyyy</string>

<key>SKAdNetworkItems</key>
<array>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>5f5u5tfb26.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>mj797d8u6f.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>vhf287vqwu.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>6yxyv74ff7.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>k6y4y55b64.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>xga6mpmplv.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>cstr6suwn9.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>4fzdc2evr5.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>4pfyvq9l8r.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>2fnua5tdw4.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>ydx93a7ass.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>5a6flpkh64.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>p78axxw29g.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>v72qych5uu.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>ludvb6z3bs.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>cp8zw746q7.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>3sh42y64q3.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>c6k4g5qg8m.skadnetwork</string>
    </dict>
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        <key>SKAdNetworkIdentifier</key>
        <string>s39g8k73mm.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>3qy4746246.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>f38h382jlk.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>hs6bdukanm.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>v4nxqhlyqp.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>wzmmz9fp6w.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>yclnxrl5pm.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>t38b2kh725.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>7ug5zh24hu.skadnetwork</string>
    </dict>
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        <key>SKAdNetworkIdentifier</key>
        <string>gta9lk7p23.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>vutu7akeur.skadnetwork</string>
    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
        <string>n6fk4nfna4.skadnetwork</string>
    </dict>
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        <key>SKAdNetworkIdentifier</key>
        <string>v9wttpbfk9.skadnetwork</string>
    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
        <string>578prtvx9j.skadnetwork</string>
    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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        <key>SKAdNetworkIdentifier</key>
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        <key>SKAdNetworkIdentifier</key>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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        <key>SKAdNetworkIdentifier</key>
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        <key>SKAdNetworkIdentifier</key>
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    </dict>
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        <key>SKAdNetworkIdentifier</key>
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        <string>f2zub97jtl.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>fq6vru337s.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>fz2k2k5tej.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>gvmwg8q7h5.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>hjevpa356n.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>jk2fsx2rgz.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>nlqeag3gk.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>pu4na253f3.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>qp299437r.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>qwpu75vrh2.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>r8lj5b58b5.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>sczv5946wb.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>t6d3zquu66.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>tmhh9296z4.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>x8yj322td6.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>z4gj7hsk7h.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>apzhy3va96.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>ns5j362hk7.skadnetwork</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>thzdn4h5nc.adattributionkit</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>raa6f494kr.adattributionkit</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>6lz2ygh3q6.adattributionkit</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>m2jqnlggk3.adattributionkit</string>
    </dict>
    <dict>
        <key>SKAdNetworkIdentifier</key>
        <string>pg7ctvrt6f.adattributionkit</string>
    </dict>
</array>

Console Settings

To use backfill ads, configuration is required in AdControl Console.

Select Ad Unit

Select the unit to configure backfill in AdControl Console > Ad Unit.

Configure Backfill

Enable Backfill Ad option in unit settings and select a backfill source.

Save

Save the settings.

See Backfill Ad Guide for detailed console configuration.

SDK Implementation

Backfill ads are handled automatically by the SDK. If primary ad loading fails, the configured backfill ad is automatically loaded.

import AdropAds

class ViewController: UIViewController, AdropBannerDelegate {
    private var banner: AdropBanner?

    override func viewDidLoad() {
        super.viewDidLoad()

        // Implement same as regular banner ad
        banner = AdropBanner(unitId: "YOUR_UNIT_ID")
        banner?.delegate = self

        if let bannerView = banner {
            view.addSubview(bannerView)
            // Auto Layout setup...
        }

        banner?.load()
    }

    // Backfill ads are handled through the same delegate
    func onAdReceived(_ banner: AdropBanner) {
        print("Ad received (primary or backfill)")
    }

    func onAdFailedToReceive(_ banner: AdropBanner, _ errorCode: AdropErrorCode) {
        // Called when both primary and backfill ads fail
        print("Ad receive failed: \(errorCode)")
    }
}

Native Ad Backfill

Backfill is automatically applied to native ads in the same way.

nativeAd = AdropNativeAd(unitId: "YOUR_UNIT_ID")
nativeAd?.delegate = self
nativeAd?.load()

// Receive primary or backfill ad in delegate
func onAdReceived(_ nativeAd: AdropNativeAd) {
    print("Ad received successfully")
    // Bind to view
}

How Backfill Works

SDK requests primary ad
If primary ad fails to load, automatically requests backfill ad
Backfill ad received successfully → onAdReceived called
Backfill ad also fails → onAdFailedToReceive called

Backfill ads only work when configured in the console. You can enable/disable backfill through console settings alone without SDK code changes.

UMP (User Messaging Platform) Integration

Backfill SDK supports GDPR and CCPA compliance through Google UMP. Use the Consent Manager to request user consent.

Basic Usage

import AdropAds

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Call after Adrop.initialize()
        Adrop.consentManager?.requestConsentInfoUpdate(from: self) { result in
            if let error = result.error {
                print("Consent error: \(error)")
            }
        }
    }
}

Status	Description
`unknown`	Consent status not yet determined
`required`	Consent required (popup will be shown)
`notRequired`	Consent not required (non-GDPR region)
`obtained`	Consent already obtained

Debug Settings (Test Mode)

Test GDPR/CCPA consent flows during development:

import AdropAds

#if DEBUG
// Set debug geography before requesting consent
Adrop.consentManager?.setDebugSettings(
    testDeviceIdentifiers: ["YOUR_DEVICE_IDENTIFIER"],  // Check Xcode console
    geography: .EEA  // Test GDPR
)

// Reset consent for testing
Adrop.consentManager?.reset()
#endif

Geography	Description
`disabled`	Use actual device location
`EEA`	Test GDPR (European Economic Area)
`regulatedUSState`	Test CCPA (California, etc.)
`other`	Test non-regulated regions

Display AdSense ads in your WKWebView by registering it with the Adrop SDK.

Info.plist Configuration

Add the following key to your Info.plist to enable AdSense in WebView:

Info.plist

<key>GADIntegrationManager</key>
<string>webview</string>

This configuration is required for AdSense ads to work properly in WebView. Without it, AdSense ads may not display.

Register WebView

import WebKit
import AdropAds

class WebViewController: UIViewController {

    @IBOutlet weak var webView: WKWebView!

    override func viewDidLoad() {
        super.viewDidLoad()
    
        // Initialize a WKWebViewConfiguration object.
        let webViewConfiguration = WKWebViewConfiguration()
        // Let HTML videos with a "playsinline" attribute play inline.
        webViewConfiguration.allowsInlineMediaPlayback = true
        // Let HTML videos with an "autoplay" attribute play automatically.
        webViewConfiguration.mediaTypesRequiringUserActionForPlayback = []
    
        // Initialize the WKWebView with your WKWebViewConfiguration object.
        webView = WKWebView(frame: view.frame, configuration: webViewConfiguration)
        // Register WebView for AdSense support
        // Call as early as possible, before loading content
        Adrop.registerWebView(webView)

        // Load your web content
        if let url = URL(string: "https://your-website.com") {
            webView.load(URLRequest(url: url))
        }
    }
}

registerWebView() must be called on the main thread. Call this method as early as possible (e.g., in viewDidLoad), before loading any web content.

AdSense in WebView requires adrop-ads-backfill module. If the module is not installed, registerWebView() is silently ignored.

Best Practices

1. Error Handling

Prepare fallback UI for when both backfill and primary ads fail.

func onAdFailedToReceive(_ banner: AdropBanner, _ errorCode: AdropErrorCode) {
    // Both primary and backfill failed
    // Display alternative content or hide ad area
    bannerContainerView.isHidden = true

    // Or display your own promotional banner
    showPromotionBanner()
}

2. Logging

Check which ad was loaded in debug mode.

func onAdReceived(_ banner: AdropBanner) {
    #if DEBUG
    print("Ad received successfully - Unit ID: \(banner.unitId)")
    #endif
}

3. Frequency Monitoring

If backfill ads are shown frequently, monitor ad quality. You can check the ratio of primary to backfill ads in the console dashboard.

Banner Ads

Implementing banner ads

Native Ads

Implementing native ads

Backfill Settings (Console)

Configure backfill ads in console

Reference

API reference

SDK Guide

AI

Android

iOS

React Native

Flutter

Web

REST API

Overview

Before You Start

Installation

1. Podfile Setup

2. Info.plist Setup

Console Settings

SDK Implementation

Banner Ad Backfill

Native Ad Backfill

How Backfill Works

UMP (User Messaging Platform) Integration

Basic Usage

Debug Settings (Test Mode)

Info.plist Configuration

Register WebView

Best Practices

1. Error Handling

2. Logging

3. Frequency Monitoring

Banner Ads

Native Ads

Backfill Settings (Console)

Reference

SDK Guide

AI

Android

iOS

React Native

Flutter

Web

REST API

​Overview

​Before You Start

​Installation

​1. Podfile Setup

​2. Info.plist Setup

​Console Settings

​SDK Implementation

​Banner Ad Backfill

​Native Ad Backfill

​How Backfill Works

​UMP (User Messaging Platform) Integration

​Basic Usage

​Consent Status

​Debug Settings (Test Mode)

​AdSense Ads in WebView

​Info.plist Configuration

​Register WebView

​Best Practices

​1. Error Handling

​2. Logging

​3. Frequency Monitoring

​Related Documentation

Banner Ads

Native Ads

Backfill Settings (Console)

Reference

Overview

Before You Start

Installation

1. Podfile Setup

2. Info.plist Setup

Console Settings

SDK Implementation

Banner Ad Backfill

Native Ad Backfill

How Backfill Works

UMP (User Messaging Platform) Integration

Basic Usage

Consent Status

Debug Settings (Test Mode)

AdSense Ads in WebView

Info.plist Configuration

Register WebView

Best Practices

1. Error Handling

2. Logging

3. Frequency Monitoring

Related Documentation