Countable noun refers to anything that you can be counted. It includes animals, persons, places or things. Here are some examples: Fish, soldier, pencil.
Uncountable noun refers to things that cannot be counted. Uncountable nouns are mostly intangible things. They include things like emotions, character traits and ideas.
Examples include: Joy, happiness, love, flour and rain.
Countable and uncountable nouns can be in singular or plural forms. In the singular form, the noun is preceded by 'a/an'. Uncountable nouns can be used alone but it can also be used along with words like: much, some,a little and any.
Countable and uncountable nouns might seem confusing—but it is actually pretty simple! Countable nouns are those people, places, or things that can be counted. So, people, places, or things that can be counted—dogs, cups, ideas, or jackets can all have a number placed before them to identify how many of each there are (one dog, two cups, three ideas, four jackets.)
Uncountable nouns are the items we can't count with numbers: abstract ideas, qualities, or physical objects that are too small or too amorphous to count: love, money, tea, sugar. When talking about these types of nouns, you might say, 'some love,' 'no money,' 'more tea,' or 'less sugar.'