An Open Source Intelligence (OSINT) test provides a window into the public data exposure of your enterprise. This type of testing allows you to see how an advanced threat actor would go about the initial reconnaissance stages that would inform the next steps of a targeted attack.
This test provides you with value by identifying problem areas for data leakage, which you can then work towards reducing. This makes cracking the perimeter of your network more difficult for determined attackers. It also helps prevent opportunistic attacks when hackers are simply looking for an easy win.