Comment by adrianmonk

I could see this being useful for work stuff. Learn the names and faces of all the people in your department as well as other info like what projects they're working on, expertise they have (this person knows all about databases, that person knows Linux really well, etc.), who they report to, etc.

Then when it's time to collaborate on something, or when you need to keep the appropriate people in the loop, hopefully the right people just pop into mind. And if you get invited to a meeting with 5 people you don't normally work with, you can probably make an educated guess why they're attending.