A Step-On guide is an experienced tour guide who literally steps onto your bus when it arrives. The guide provides the onboard narration, navigates the journey and makes sure you will get in and out of each site in a timely manner. The Step-On guide does not drive the bus or make the behind the scenes arrangements for your tour. Like any other service provider, such as a waiter in a restaurant, you can show you appreciation for their work by offering them a gratuity at the end of your trip.