Learn Italian: Come faresti ad abbinare questo dettaglio?

Faresti is the present conditional of fare (to do/make) for "you". Regular verbs ending in -are usually change their "a" to an "e" in the conditional (like parlare becoming parleresti). However, fare is irregular because it keeps its "a", using the stem far-. You just add the standard ending -esti to get faresti (would you do).

Why do we say faresti ad abbinare instead of just using the conditional word for "would match" (abbineresti)?

The phrase come fai a (or in the conditional, come faresti a) is a very common Italian idiom. It translates roughly to "how do you go about [doing something]?" or "how do you manage to [do something]?" So while you could say come abbineresti, using come faresti ad abbinare is a very natural way to ask "how would you go about matching" this detail.

Why is there a "d" at the end of the word ad?

The word is originally the preposition a (to). When a comes right before a word that starts with the same vowel "a" (like abbinare), Italians often add a "d" to make it flow better when spoken. This is called a euphonic (good-sounding) "d" and it prevents a choppy pause between the two "a" sounds.

Is abbinare used for matching any kind of thing?

Abbinare specifically means to pair or combine things that go well together. You will hear it most often in everyday life when talking about fashion (matching colors and clothes) or food (pairing a specific wine with a meal).