Click the Customers link on the left-hand sidebar and click + Instance on the customer you would like to deploy to.
Select the integration you created and published from the menu, and give the instance a name and description of your choice.
Once your instance has been created, you will be brought to the instance's Configuration screen.
On the bottom of this page, you can customize Slack Webhook URL and Todo API URL for this customer (or leave the defaults). Once you are satisfied with the configuration, click the SAVE AND DEPLOY button on the top of the page.
You can now test the instance by clicking into the Test tab and clicking RUN TEST. You should get a Slack message, as you did before.
Since Prismatic charges per deployed instance, and free accounts have a limit of 4 deployed instances, you probably want to delete this instance. When you're ready, click the Delete Instance button on the bottom of the instance configuration page.
Your first integration has been deployed to one customer, but can be deployed to multiple customers now (each with their own API endpoint and Slack webhook URL). In the next getting started tutorial, you will add monitoring and alerting to your instances, so you know if something goes wrong.
In the final step we'll cover how to productize your integration and prepare it for the integration marketplace.