sales pitch vs promo

sales pitch and promo both are nouns.

Word	Noun	Adjective	Verb	Adverb
sales pitch	Yes	No	No	No
promo	Yes	No	No	No

As nouns, promo is a hypernym of sales pitch; that is, promo is a word with a broader meaning than sales pitch:

sales pitch: promotion by means of an argument and demonstration
promo: a message issued in behalf of some product or cause or idea or person or institution

Other hypernyms of sales pitch include packaging, promotion, promotional material, publicity.

sales pitch (noun)	promo (noun)
promotion by means of an argument and demonstration	a message issued in behalf of some product or cause or idea or person or institution