# Notifly (Cohort Sync)

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The Notifly destination syncs your Amplitude-built cohort to your [Notifly](https://notifly.tech/en) user group for targeting.

## Use cases

- **Cart abandonment recovery:** Sync a cohort of users who added items to their cart but didn't complete checkout to Notifly, then trigger a user journey with reminder notifications offering incentives.
- **Feature adoption campaigns:** Create a cohort of users who haven't tried a new feature and sync it to Notifly to run a targeted campaign with in-app messages and push notifications.
- **Win-back inactive users:** Identify users who haven't opened the app in 30 days, sync this cohort to Notifly, and set up a user journey that sends a sequence of messages with personalized content, offers, or updates to re-engage them.

## Considerations

- This integration maps an Amplitude user ID to the `external_user_id` of a Notifly user.
- This integration doesn't support anonymous users. Each user must have a user ID to be identified across Amplitude and Notifly. The selected user property must exist in both Amplitude and Notifly.
- Notifly creates one user group per cohort. To avoid cohort discrepancies, each new sync for the same cohort resets the existing user group. ("New sync" refers to a newly added destination.) Be careful when syncing again with a different mapping.

## Set up the integration

### Notifly setup

1. In Notifly, go to Settings.
2. Copy the Project ID and API Credentials (Access and Secret Key).

### Amplitude setup

1. In Amplitude Data, go to _Catalog > Destinations_ tab.
2. In the Cohort section, click **Notifly**.
3. Enter a name, your Notifly Project ID, Access Key, and Secret Key.
4. Map an Amplitude user ID to the Notifly `external_user_id`. You can choose any pre-defined or custom user property in Amplitude to serve as the user ID.
5. Save your work.

## Send a cohort

1. In Amplitude, open the cohort you want to export. Click Sync, and choose Notifly.
2. Choose the destination.
3. Select the sync cadence.
4. Save your work.

> **Note:**
>
> For scheduled cohort syncs, only the initial sync includes the full cohort. All subsequent syncs include additions and removals since the last sync.

## Use the cohort in Notifly

After you send your Amplitude cohort to Notifly, the cohort appears in the _User Groups_ section of the Notifly dashboard. Cohorts sent by Amplitude include an "(Amplitude)" suffix in the name.

Notifly only ingests users for whom Notifly has identifiers.

> **Example:**
>
> User A, User B, and User C are in the Amplitude cohort (Cohort 1). Notifly only has identifiers for User A and User C. Notifly creates a user group that includes User A and User C, and drops User B.