It's exclusive: the vehicle is only for you or your group, you don't share it with strangers. It's direct: it goes from the origin to the destination with no intermediate stops to pick up or drop off other people. It's more flexible, with adjustable or on-demand schedules and, in many cases, the option to wait or make small detours. It's faster and more predictable, since travel time is just the actual drive, with no waiting or detours for other passengers. And it's more comfortable and personalized: it usually offers more privacy, space and, sometimes, extra services such as help with luggage or a child seat.