# Deeplinking support

> Enhance engagement and conversion by directing users to specific in-app content or promotions.

Deeplinking support directs users to specific pages inside your app. It is designed to provide a streamlined experience to continue the game and app onboarding experience and unfinished customer journey.

The following requirements apply to Deeplinking support:

* Respond with `resp.seatbid[0].bid[0].ext.deeplinking:1`
* Include the following Deeplinking schema in the custom format in the `ClickThrough` node:

```text
deeplinker://navigate?primaryUrl=twitter%3A%2F%2Ftimeline&fallbackUrl=https%3A%2F%2Fmobile.twitter.com&primaryTracker=https%3A%2F%2Funity.com%2Ftracker%3Ffeature%3Ddeeplinking%26type%3Dprimary&fallbackTracker=https%3A%2F%2Funity.com%2Ftracker%3Ffeature%3Ddeeplinking%26type%3Dfallback
```

* `**deeplinker:**//navigate`: Unity Ads custom deeplink protocol
* Four query parameters: `primaryURL`,`fallbackUrl`,`primaryTracker`,`fallbackTracker`
  * `primaryURL`(required): deeplink URL fired on click event
  * Must be properly encoded URL
  * **Example:** `twitter%3A%2F%2Ftimeline`
  * `fallbackUrl`(optional: used if primary fails): normal URL link (starts with https) fired if deeplink fails
  * Must be properly URL encoded
  * Will be validated as a regular URL
  * **Example:** `https%3A%2F%2Fmobile.twitter.com`
  * `primaryTracker`(optional): normal url link (starts with https) fired when `primaryUrl` is fired successfully
  * Must be properly URL encoded
  * Will be validated as a regular URL
  * **Example:** `https%3A%2F%2Funity.com%2Ftracker%3Ffeature%3Ddeeplinking%26type%3Dprimary`
  * `fallbackTracker`(optional): normal URL link (starts with https) fired when `fallbackUrl` is fired successfully
  * Must be properly URL **encoded**
  * Will be validated as a regular URL
  * **Example:** `https%3A%2F%2Funity.com%2Ftracker%3Ffeature%3Ddeeplinking%26type%3Dfallback`

> **Note:**
>
> The `primaryUrl`, `fallbackUrl`, `primaryTracker`, `fallbackTracker` must be properly URL encoded in the whole deeplink URL to work correctly. URLs that are not properly encoded will not work correctly. For example: format `deeplinker://navigate?primaryUrl=unity://game?a=b&c=d should be deeplinker://navigate?primaryUrl=unity%3A%2F%2Fgame%3Fa%3Db%26c%3Dd`