Emotional granularity means describing feelings with finer distinctions rather than placing many different experiences under one broad label.
"Bad" could include lonely, ashamed, disappointed, irritated or afraid. Those aren’t interchangeable requests for care.
What kind of upset is this?
You call yourself stressed after a meeting. Looking closer, you were embarrassed by one comment and disappointed that your work wasn’t acknowledged.
You may still need rest. You might also want a conversation or a change in how feedback is given. The more specific description offers options the word stressed didn’t show you.
There is no exam in emotional vocabulary. The aim is a description that helps you understand your own response. "Small and wanting to disappear" can be more useful than the correct-sounding word you don’t quite recognise.
Emotional literacy connects naming with responding. Felt sense explores the less clearly named bodily sense of a situation before a precise word arrives.
Noba’s Emotion Experience and Well-Being offers a broader introduction to emotional experience. It provides context for the distinctions here, rather than a claim that learning more emotion words automatically changes every difficulty.