Quantifier is a word or phrase which is used before a noun to indicate the amount or quantity:
'Some', 'many', 'a lot of' and 'a few' are examples of quantifiers.
Quantifiers can be used with both countable and uncountable nouns
There are some books on the desk
He's got only a few dollars.
How much money have you got?
There is a large quantity of fish in this river.
He's got more friends than his sister.