This is the 8268th most frequent German word.
jo
"Jo" is an informal German word meaning "yes" or "yeah," often used regionally, especially in southern Germany and Austria.
Here, 'Jo' is used as a colloquial affirmation, similar to 'yeah' in English.
Jo, ich werde es machen.
Yeah, I will do it.
In this sentence, 'Jo' functions as a casual yes in a past narrative context.
Ich sagte 'Jo', und dann ging ich.
I said 'Yeah,' and then I left.
'Jo' serves here as a minimal reply indicating agreement or acknowledgment, demonstrating its use as an informal synonym for 'yes'.