Explain deferred deep linking flow

WHAT THIS TESTS This evaluates understanding that a deep link requires the app to exist, so reaching specific content from a pre-install click needs a deferral and matching mechanism.

A GOOD ANSWER COVERS The core problem: a standard deep link only works if the app is installed; a first-time user has no app to receive it, so the intended destination must be carried across install. Flow: the user taps a marketing link that hits a routing service, which records the destination payload and a match key, then redirects to the App Store or Play Store. The user installs and opens the app. On first launch the SDK calls back to the service and matches this install to the earlier click, either via a deterministic deferred-link mechanism or a probabilistic device-fingerprint match. The service returns the stored payload, and the app routes the user to the specific content instead of a generic home screen. Universal links and App Links handle the post-install case directly.

COMMON WRONG ANSWERS Saying a URI scheme or universal link works before the app exists. Forgetting the store redirect step. Assuming the OS passes the original URL into a fresh install automatically on both platforms. Ignoring that fingerprint matching is probabilistic and degrades with privacy changes.

LIKELY FOLLOW-UPS How does deferred matching differ between iOS and Android, and how have privacy changes affected fingerprinting? What is the role of a clipboard or first-party token versus probabilistic matching? How do universal links differ from deferred deep links?

ONE CONCRETE EXAMPLE A user without the app taps a link to a specific product. The routing service stores destination equals product 8842 with a match token and redirects to the App Store. The user installs and opens the app; on first launch the SDK reports the install, the service matches it to the click, returns product 8842, and the app opens directly to that product page rather than the default feed.