# 3.1.2.1 Test with users

Usability testing allows you to observe firsthand how users interact with your product. You can identify any challenges they encounter and understand the 'why' behind their behaviour. This improves user experience and can prevent costly redesigns later on.

Further reading and resources for usability testing include:

* [Nielsen Norman Group’s guide to usability testing](https://www.nngroup.com/articles/usability-testing-101/)
* [The UK's Government Digital Services guide to planning research](https://www.gov.uk/service-manual/user-research/plan-user-research-for-your-service)
* [The UK's Government Digital Services guide to conducting usability testing](https://www.gov.uk/service-manual/user-research/using-moderated-usability-testing)