Hierarchical labeling is a labeling method that organizes labels in a tree-like structure, with more general labels at the top and more specific labels at the bottom.
Imagine you're at a fancy library, and you want to find a book about, say, 'Corgis in Space'. You'd start by looking at the 'Dogs' section, then 'Corgis', then 'Corgis in Space'. That's hierarchical labeling!
It's like, but not actually like, a real library, because we're not actually in a real library, and we're not actually looking for books, because we're not actually in a real world.
Hierarchical labeling is useful for making things easier to find, like finding that one book in a million.
But it's also useful for being very, very, VERY confusing, like when your aunt tries to explain it to you over a phone call.
Next: Semantic Labeling (Advanced)