As teams adopt Agile and any of the related frameworks (e.g. Scrum, Kanban) for software development.

Jira provides the foundation for managing software projects in an Agile way, by promoting collaboration, transparency, estimation, commitment and flexibility, among many others.

Xray extends Jira and adopts embraces Agile values and principles to enable Agility in teams. Besides Agile Board Enhancements, there are many aspects that you can take advantage whenever 

As teams adopt Agile and any of the related frameworks (e.g. Scrum, Kanban) for managing the software development, they can take advantage of Xray right away for all testing related activities.

Using Xray in an Agile context page provides clear guidance on how to implement Xray, enumerating all the possibilities and the flexibility options that you have; remember that being Agile means giving your team freedom to adapt to their needs. Some of the cool features that can give your team testing/quality awareness without almost no work is the Agile Board Enhancements, but there is much more that you may benefit from.