---
title: Overview
slug: wu-ajo-hol/overview
docTags: 
createdAt: 2025-07-18T20:07:27.604Z
---

These set of labs are built to allow advanced users to understand how to build more complex journeys. It will require some technical role to do most of this work. 

Journeys can be triggered by Experience Events, those events can serve as Webhooks. You can start a journey with an event or you can listen to an event to occur in the middle of your journey. 

Journeys can use custom actions to get information or post information from/to external systems. These nodes are very good when calling REST APIs in realtime to enrich even further our journeys. 

This set of labs also use an additional technology that is outside of the scope of this lab. We are using this technology to facilitate your validation. It is a set of enterprise tools we built using [Adobe App Builder](https://developer.adobe.com/app-builder/). It will allow to trigger campaigns and journeys that have been published for your validation.