When creating your Audit Template, you have the option to mark a Section as a Priority Section and give a minimum score allowed for this Section of the audit. 

This means that regardless of the score for the rest of the audit, if the Section marked as a priority achieves a score lower than that set here, the audit as a whole will be marked as a Fail. 

In this example two instances of the audit have scored the same, however one is marked FAIL and another Pass.  This FAIL is due to the user not passing the required pass mark on the priority section.

There is also a difference in the type of audit fail symbol.

To set an Audit Section as a Priority please refer to the relevant guide:

Building an Audit Template - please refer to this guide if you are building your audit from scratch

Editing an Audit Template - please refer to this guide if you are editing an existing audit template