Tree Information can be set up on the individual item when it is created, or through Mass Updates. The Tree View in Mass Updates is derived directly from the information entered in the Tree Information section in Item Details. See below:
Ultimately, it’s best to have items grouped together if they have the same prices. In the picture above, clicking the Winston heading in Mass Updates will filter to all Winston packs that have the same price. This way, if the prices change, we can click our Winston heading, and update the prices for all full price Winston packs all at once.