Updating the Kobo’s Collections with Calibre tags, Sci Fi, Fiction, Self-help etc.
Calibre tags are tags that are self-assigned or come with the Metadata download. You can block tags from being downloaded in Preferences > Metadata Download > Metadata fields, and check any items you want.
The Kobo’s Collections are updated from the book’s tags on the first upload. If the tags are updated in Calibre, by default Kobo’s Collections won’t be. The Calibre Metadata management, change from Manual to Auto and the Kobo plugin need to be configured. link