What is the meaning of Promo?

Clipping of promotion.

an interview or monologue intended to promote a character or an upcoming match.

A reduction in consumer cost for a limited time for items or services rendered; a special.

To promote; to publicize.

promo (promotion; event to increase reach or image of a product or brand)

promo

year group, school year

to take or bring out or forth, produce, bring to light

promo (promotional material)

promo

Source: wiktionary.org