Adding Your App Onto a Site Collection

Procedure
1. Navigate to the site collection where you want to register the remote event receiver for HTTP Notification Listener.
2. Click Site Contents.
3. Navigate to New > App > Your Apps > From Your Organization.
   You can find your add-in which you can add on your site collection.
4. On the Do you trust EventReceivers- <date> window, click Trust It to add the add-in.