The difference between tracks and tags are that tracks are used to group together sessions based on their time slots, while tags are used to group together sessions based on their time category.
For example, if you have 3 sessions starting at 9am, 10am, and 11am, they could be grouped together under a track titled "Morning Sessions". If you have 3 sessions titled “Hair Cutting”, “Hair Coloring”, and “Hair Blow Drying”, they could be grouped together under a tag titled "Hair Styling".