Asset Node Tags have been significantly improved for visibility and reusability. Node Tags can be reused within an asset and across assets much like Item Tags within the Catalog.
Nodes can be tagged at the top of the Node properties panel and existing tags can be seen there:
Nodes with tags can be identified easily in the Node Tree via the tag icon:
Nodes can be tagged in bulk using the updated bulk node actions at the top of the Node Tree:
Nodes can be tagged in bulk using exiting Tags, new tags, an existing Tags can be removed:
Node Tags can be used to simplify logic by targeting Nodes based on Tags rather than name much like Part Reference attributes:
Node Tags can also be used across Assets for features like Dimensions, where a dimensions within a Scene asset can target specific nodes in nested Assets by tag value.