This is the 4658th most frequent Catalan word.
promocional
Promotional.
Here, 'promocional' is used as an adjective to describe the type of catalog, indicating that its purpose is promotional.
Aquest any hem rebut un catàleg promocional molt complet.
This year, we have received a very comprehensive promotional catalog.
In this sentence, 'promocional' is used as an adjective modifying 'campanya', specifying that the campaign's function is to promote.
La campanya promocional d'estiu inclou descomptes a totes les botigues.
The summer promotional campaign includes discounts at all stores.
Here, 'promocional' again acts as an adjective, describing the content as being for promotional use or purposes.