When you book a tour, you can choose that tour to be either a Standard Tour, or a VIP Tour. The difference between the two is that with a VIP Tour, it is just your booking and the guide - no other bookings will be with you. The VIP Tour is therefore a Private Tour. Contrastingly, the Standard Tour means that your booking will be will other people who have also booked the same time-slot. If your group has more than 5 people in it, it is usually cheaper to book a VIP Tour to ensure you have a personal experience.