English is full of nouns that are commonly uncountable. Words like information, advice, homework, and furniture do not usually take a plural ending. We cannot say "one advice" or "two furnitures", so we rely on phrases like "a piece of" to count them.
Italian is much more flexible. Many concepts that act as uncountable nouns in English have perfectly normal, countable equivalents in Italian. You can put a number right in front of words like informazione or consiglio, and they frequently appear in the plural.
Word list
capellimA1hairun capello = a single haircompitimA1homeworkun compito = one taskcompiti a casamA1homeworkcompiti a casa = homeworkcompitomA1homeworkun compito = an assignmentvestitimA1clothesun vestito = a piece of clothing/dressabitimA2clothesun abito = a piece of clothing/suitconsigliomA2adviceun consiglio = a piece of adviceinformazionefA2informationun'informazione = a piece of informationmobilemA2piece of furnitureun mobile = a piece of furnituremobilimA2furnituremobili = furniturenotiziafA2newsuna notizia = a news itemalloggiomB1accommodationun alloggio = a place to stayarmaturafB1armorun'armatura = a suit of armorbagagliomB1luggageun bagaglio = a piece of luggageconoscenzafB1knowledgele conoscenze = knowledgefrutto di maremB1seafoodun frutto di mare = a piece of seafoodfulminemB1lightningun fulmine = a lightning strikegioiellomB1jewelun gioiello = a piece of jewelrylampomB1lightningun lampo = a flash of lightningnotiziefB1newsuna notizia = a news itemprogressomB1progressun progresso = an improvementricercafB1researchuna ricerca = an individual studytuonomB1thunderun tuono = a clap of thunderapparecchiaturafB2equipmentun'apparecchiatura = a piece of equipmentattrezzaturafB2equipmentun'attrezzatura = a piece of equipmentbagaglio a manomB2carry-onun bagaglio a mano = a carry-on bagcalzaturafB2footwearuna calzatura = a piece of footwear/shoecorazzafB2armoruna corazza = a piece of armor/breastplategioiellimB2jewellerygioielli = jewelrypettegolezzomB2gossipun pettegolezzo = a piece of gossipposatefB2silverwareuna posata = a utensilprovafB2evidenceuna prova = a piece of evidencerifiutomB2garbageun rifiuto = a piece of trashsaettafB2lightninguna saetta = a bolt of lightningapplausomC1applauseun applauso = a round of applausebene immobilemC1real estateun bene immobile = an item of real estateimmobilemC1propertyun immobile = a propertyimpalcaturafC2scaffoldingun'impalcatura = a scaffoldponteggiomC2scaffoldingun ponteggio = a scaffoldrottami metallicimC2scrap metalun rottame metallico = a piece of scrap metal
Information, advice, and news
Let us look at some of the most common concepts that require a unit like "piece of" in English. In Italian, you just use the singular form for one item and the plural form for multiple items.
Posso darti un consiglio?
(Can I give you a piece of advice?)
Abbiamo ricevuto due informazioni utili.
(We received two useful pieces of information.)
The same logic applies to notizia (news). While "news" always takes a singular verb in English despite ending in an "s", Italian treats it as a standard countable noun.
Ho una buona notizia per te.
(I have some good news for you.)
Daily tasks and physical objects
Physical items and daily chores often fall into this category. For instance, school homework is treated as individual tasks in Italian. You will usually see compito or compiti a casa in the plural when a student has a lot of work to do.
Ho troppi compiti stasera.
(I have too much homework tonight.)
Furniture and luggage follow the exact same rule. A single item of furniture is un mobile, and multiple items are mobili. A single suitcase or bag is un bagaglio, while all your bags together are your bagagli.
Abbiamo comprato tre mobili per il salotto.
(We bought three pieces of furniture for the living room.)
Quanti bagagli avete?
(How much luggage do you have?)
Similarly, English words that are uncountable like jewelry or always plural like clothing are counted as individual things in Italian. Hair works this way too. A single hair is un capello, and a full head of hair is plural.
Ha dei bellissimi capelli lunghi.
(She has beautiful long hair.)
Concepts, evidence, and equipment
Abstract concepts and broad categories work just like physical objects. Words for research, evidence, progress, and equipment can be counted directly. For example, una ricerca is a single research study, and nuove prove translates to new evidence.
I ricercatori hanno pubblicato due ricerche.
(The researchers published two research studies.)
La polizia ha trovato nuove prove.
(The police found new evidence.)
Manca un'attrezzatura importante.
(An important piece of equipment is missing.)
Summary
When speaking Italian, do not let English uncountable nouns hold you back. Words for advice, information, news, homework, and furniture can all be counted normally using numbers, indefinite articles, and regular plural endings.