I'm pretty sure its a data collection company that sells information to advertisers and marketing agencies. Its a virtual sweatshop of sorts. First to escape the monotony and gloom of sitting in a large dimmed room with dozens of other employees, the virtual glasses are provided to take the employee to his or her "cubicle". Then the next layer of reality is viewed on a virtual laptop on the virtual desk. From there employees are exposed to the "private' lives of people through their webcams and smartphone cameras... not exactly private, but we can assume these subjects have accepted the Permissions to access these portals at some benefit, maybe a free app, a membership, or monetary compensation, etc..
The sweatshop employ then has to identify the things that they see and hear in the videos, items, brands, materials, media, shows on the TV, etc... then I would assume these huge volumes of data are compiled and SOLD to the above-mentioned agencies for a large profit. Really not much different than what is happening in real life right now. I guess this would be the next level of personal data collection, and probably hits the mark on the direction we're going with the desire to know What People Want.
[Side note. I think Vos starts to become unraveled at the work station because the "job" adds to many layers of false reality to her already massive shift in reality. Vos herself exists in the real world at a very sterile and spartan facility where she is treated with a mixture of respect and abuse. She is then shifted/sent to experience the world through another humans faculties, then that person goes to work, puts on VR goggles and goes to the virtual cubicle with large windows looking out on large beautiful scenery, then finally shifts her perceptions through a webcam to look into the lives of random people doing random and sometimes raunchy things.... that's a lot of levels of false reality, and I'm sure her head was spinning.]