@Robert-Collings
Routes have a starting point and a destination, and perhaps some stops. Your device calculates your preferred type of route between all these points, for example, the fastest or most economical. You can edit a route by, for example, adding stops or moving the starting point.
Tracks also have a starting point and a destination, but have no stops. Your route follows the track as closely as possible, ignoring your preferred type of route and traffic conditions.