# Trigger

![](/files/-MLJClvghsLCynl4r6Le)

When you create a new follow-up email the first step to do is to choose a trigger.\
This is the action that will trigger your follow-up and send emails to users.\
If you're thinking about a trigger that is not listed in this page you can always contact us by clicking on the button suggest an idea to share with us your idea.

To select a trigger, it's really simple, you just need to click on the trigger that you want and then click on the create button.

{% hint style="warning" %}
You can't change a trigger if you're editing an existing follow-up
{% endhint %}

### WordPress trigger

* **WooCommerce purchased**: This trigger is when an order status is changed in WooCommerce

### Joomla trigger

* **Hikashop purchased**: This trigger is when an order status is changed in Hikashop

### Core trigger

* **Birthday**: This trigger works with the [daily cron](/setup/configuration/queue-process.md#automated-tasks)
* **User creation**: When a new user is created, from any source (from the front-end or by an admin)
* **User subscribe**: When a user chooses to subscribe to a list (from the front-end, including hidden lists on subscription forms). Automations and admins manually subscribing users to a list won't trigger the follow-up campaign.


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