Countable nouns can be counted (one book, two books); uncountable nouns can't (water, advice, information). We use 'a/an' and numbers with countable nouns; we use 'some', 'much', or no article with uncountable. Many languages don't have this distinction, so it's a common area for practice.
Countable: a book, three ideas, many people. Uncountable: water, advice, information, rice. Some nouns can be both with different meanings ('a coffee' vs 'coffee'). Rozy helps you use the right form in real sentences and corrects you when you slip.
Saying 'I need an advice' or 'much books' sounds wrong to native speakers. Practising in conversation with feedback builds the right habits.
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