Hey there, let's work through your Branch.io deep linking problems with Facebook Ads, and I'll share some reliable alternative ways to test things out.

1. Fixing "Preview Ad" Deep Link Not Working #

First, let's tackle the core issue where your preview ad's deep link isn't behaving as expected:

• Double-check your Branch link configuration: Head to your Branch dashboard and verify the link has the correct deep link parameters (like $deeplink_path, $android_deeplink_path, $ios_deeplink_path). Also confirm your App Store/Google Play package names match exactly—even a tiny typo can break things.
• Ensure you're using Branch's App Ads URL: Facebook requires a specific format for app ads links, so make sure you generated a dedicated App Ads URL in Branch (not a regular deep link) and pasted that into your Facebook Ad's deep link field.
• Debug your app's Branch integration: Turn on Branch's debug logging in your app (Android: Branch.enableLogging();, iOS: Branch.setDebug();). Then tap the preview link on your phone and check the logs for errors—look for messages about failed link parsing, missing parameters, or SDK initialization issues.
• Verify Facebook App Association: In the Facebook Developer Portal, confirm your app has proper Associated Domains (iOS) or App Links (Android) set up for your Branch domain. For iOS, ensure your apple-app-site-association file includes the Branch domain; for Android, check that assetlinks.json has the correct package name and signature fingerprint.

2. Fixing App Ads Helper "Test Deep Link" Not Sending Notifications #

If you're not getting test links via the App Ads Helper, try these steps:

• Confirm App ID and link validity: Make sure you selected the correct Facebook App ID in the helper, and the link you're testing is a valid Branch App Ads URL (not a regular web link).
• Check device permissions: Ensure your phone is logged into the same Facebook account as the helper, and you've allowed Facebook to send notifications (sometimes system-level notification blocks prevent these test links from coming through).
• Refresh and re-trigger: Sometimes the helper has minor glitches—refresh the page, re-select your App ID, and try the "Test Deep Link" button again. If you're in a region with restricted Facebook access, you might need to ensure your network can reach Facebook's services.

Reliable Alternative Testing Methods #

If the above fixes don't work, or you want more robust testing options, try these:

• Branch's Built-in Test Tool: Go to your Branch link's detail page, click the "Test Link" button, register your test device (if you haven't already), and send the link directly to your phone. This tool gives detailed debug reports showing exactly where the link might be failing.
• Manual Browser Test: Copy your Branch App Ads URL into your phone's browser and tap it. If it doesn't redirect to your app, use Branch's Link Validator (in the dashboard under Tools > Link Validator) to scan for configuration issues.
• Facebook Test Ad Group: Create a small, test-only ad group in Ads Manager, and target it specifically to your test device (via device ID or your Facebook account). Publish it, then find the ad in your Facebook feed to test the deep link in a real-world scenario.
• Android ADB Command: Connect your Android device to your computer and run:

  adb shell am start -W -a android.intent.action.VIEW -d "your-branch-app-ads-url"
  

  This triggers the deep link directly, and you can check logcat for any errors.
• iOS Universal Links Test: Paste your Branch link into an iOS note, long-press it, and select "Open". If it opens in Safari instead of your app, your Universal Links configuration is broken—double-check the apple-app-site-association file and Facebook's domain verification.

内容的提问来源于stack exchange，提问作者Devesh V