promotional material vs promo

promotional material and promo both are nouns.

Word	Noun	Adjective	Verb	Adverb
promotional material	Yes	No	No	No
promo	Yes	No	No	No

As nouns, promotional material and promo are synonyms defined as:

promotional material and promo: a message issued in behalf of some product or cause or idea or person or institution

Other synonyms of promotional material include packaging, promotion, publicity.

promotional material (noun)	promo (noun)
a message issued in behalf of some product or cause or idea or person or institution	a message issued in behalf of some product or cause or idea or person or institution