Please close or link me to another post about this if asked before....

I was told that we had to go through these US Visit machines when we depart the USA. I was kind of lost about this, because nobody has ever said that to me in US nor the airline.
I thought it was just good enough with the departure card from the I-94.
Could someone tell me the whole story about this as I have several others here at work that are wondering....

Thanks.