Sentence ending particle “yo”
“Yo” indicates mild emphasis when the speaker is very sure of what she or he is saying.
This cookie is delicious. ( so I recommend this cookie. )
It is often used to convey informarion which the listener doesn’t know.
What time does the party start? → It starts at 3:00.
You can use “yo” to get someone’s attention.
晩ごはんですよ！ Dinner’s ready!!
“Yo” can also be used when the speaker is making a judgment, so be careful not to put too much stress on it, and do not overuse it; otherwise you might sound aggressive.