Impact on Meta Attribution and Web Campaigns

Last updated: September 22, 2025

Integrating the Meta SDK into your mobile app and launching app-based campaigns will not disrupt your existing website campaigns or attribution setup.

Website events (via Pixel or Conversions API) and app events (via the SDK) are treated as separate data sources within Meta’s Events Manager. This means that your existing website campaigns will continue to optimize and report based on website events without interference from new app signals.

However, there are some scenarios where attribution or optimization may shift if you choose to combine signals or audiences across app and web. These scenarios are optional and controllable through campaign settings.

What Remains Unchanged

  • Website Pixel and Conversions API: These continue to function independently of the app SDK. Website campaigns optimized on pixel or CAPI events are unaffected.

  • Event Deduplication: Pixel and Conversions API deduplication logic remains unchanged. App SDK events do not interfere with website deduplication.

  • Attribution Settings: Attribution windows (e.g., 7-day click, 1-day view) for website campaigns are not impacted by the addition of app events.

Where You May See Changes

  • Conversion Location: If you select Website and App as the conversion location in a campaign, Meta will optimize using both website and app events. This can shift delivery and attribution across surfaces.

  • Attribution Across Campaigns: When both website and app campaigns are live, conversions may be credited to either campaign depending on attribution rules. This does not affect tracking but may change how results are reported.

  • Auction Overlap: Running both website and app campaigns to overlapping audiences can create competition in the auction, potentially influencing delivery and cost efficiency.

  • iOS App Reporting Differences: App measurement on iOS follows SKAdNetwork and App AEM protocols, which have different attribution rules and postback timelines compared to website reporting.

Recommended Best Practices

  1. Keep Campaigns Separate:

    • Use Website as the conversion location for website campaigns.

    • Use App as the conversion location for app campaigns.

    • Test Website and App only in new or controlled campaigns if you want to explore combined optimization.

  2. Maintain Audience Control:

    • Separate website and app retargeting audiences to avoid overlap.

    • Exclude audiences where necessary to prevent auction competition.

  3. Monitor Attribution:

    • Use Breakdown by Conversion Location in reporting to see where conversions are being credited.

    • Use the Compare Attribution Settings tool to understand differences across attribution windows.

  4. Plan for iOS Reporting:

    • Expect reporting delays or aggregated data for app campaigns due to SKAdNetwork and App AEM.

    • Integrate your mobile measurement partner (MMP) with Meta to improve visibility.