If user specifies tags to the post subtree headline, those tags get added to the set of default tags set in #+filetags (and the ones inherited). For the inheritance of tags from parent headlines and #+filetags to work, org-use-tag-inheritance needs to be set appropriately if changed from the default value of t. These tags are collected together and assigned to the Hugo tags front matter variable for this post. When setting categories via Org-style tags, prefix the tags with “@".