Learn Italian: Abbiamo bisogno di una pubblicità attraente per questo prodotto. - We need an attractive advertisement for this product.

Attraente is the present participle of the verb attrarre (to attract). It is formed by taking the verb stem and adding -ente. In this sentence, it functions completely as an adjective describing pubblicità, translating to "attractive" or "appealing."

Since pubblicità is a feminine noun, shouldn't attraente end in -a?

No, because present participles used as adjectives always end in -e in the singular, regardless of whether the noun they modify is masculine or feminine. If we needed plural advertisements, the adjective would change to attraenti for both genders.

I sometimes forget how to translate "to need." Why do we use di in Abbiamo bisogno di?

The phrase avere bisogno di literally translates to "to have need of." When you need a noun or to do an action, you must use this full phrase including the preposition di. Italian doesn't have a direct single verb for "need" that works exactly like the English one.

What does the accent mark on pubblicità tell us about this noun?

The accent tells you to place the spoken stress on the final syllable. Crucially for grammar, Italian nouns ending in an accented vowel are invariable. This means they do not change their spelling in the plural, so "the advertisements" would simply be le pubblicità.