Breadcrumbs: Should i prefer parent tag, child tag or both?

[Karjala]

Seems like having one tag is enough. If so, which one is better?
Thanks

[Crow]

For me it depends on the purpose of the tags and how you like to organize your tags. I use a mix of them, e.g. #Book/Genre/Neurology

i.e. it’s a matter of preference IMO I found my use of tags, and nested/child tags, increased as my note collection grew and I wanted more fine-grained control.

[Karjala]

Thanks for commenting. Im not sure we undestood each other correctly.
Just to clarify, i mean in the yaml part, if i should prefer this:

---

child: [note B]

Or go to the sub note of that one and add this:

---

parent: [note A]

I could also put the CHILD in note A and also PARENT in note B but is there any benefit from this?