Answer:
Particle usage is pretty much when you add hiragana words to the sentence to make it grammatically correct.
Explanation:
Although I'm half Japanese, I didn't know if I was right about this. I searched it up and found a few things that may be helpful. Sorry if it's not a good explanation, my Japanese isn't very good.
(I found this part online ↓)
は (wa) follows the topic the speaker wants to talk about.
を (o) marks the grammatical object of a sentence.
も (mo) functions as “also” or “too” in English.
に (ni) indicates a place toward where someone or something moves.
So if someone was asking me my name, (in this situation the topic would be my name) they'd say something along the words of "onamae wa nandesuka?" or "お名前話なんですか?"
Note how there is "wa" or "は" in the phrase.
These "particles" are used right after a noun, verb, adjective, or sentence. (etc.)