Bicycle touring is the act of traveling via bicycle for an extended length or distance. It can vary from single or multi-day trips to multi year trips. Bikepacking is essentially off road bicycle touring and includes everything from forestry roads to single track.
The 3 types of bicycle touring are Self-Contained , Self-Supported, and Fully Supported. DIY folks will probably go the route of a Self-Contained tour, simplistic and usually the cheapest option. While those who would like to enjoy luxury touring, may choose a Fully Supported tour where gear is carried for you, meals are provided, and sleeping accommodations have already been set up.