Hi Fiona,
Hope you are doing well!
A firewall risk assessment is a detailed assessment approach of a firewall topology and configuration that has been implemented to protect your information, systems, applications, and overall business operations.
Is firewall risk assessment helpful for my organization?
The assessment will help your organization improve and maintain the various tiers of your network against the actions of hackers/viruses from disrupting business operations and stealing data.
Here is link for more information regarding this.
www.vistainfosec.com/blog/what-is-a-firewall-risk-assessment/
Thanks,
Toby