Quantifiers form a sub-class under determiners. They are adjectives or phrases that serve to answer two possible questions:
1. How many?
2. and How much?
For example: a few, a little, much, many, most, some, any, enough, etc., are quantifiers.
Quantifiers that describe quantity
Words and phrases that describe quantity include a little, none, a few, etc. Some of these are used only with:
Countable nouns - These are the nouns that answer the question How many? For example: a few, a number of, several, etc.
Uncountable nouns - These are the nouns that answer the question How much? For example: a little, a bit of, etc.)
Some of them are also used with both. These are the ones that answer both questions. For example: such as no/none, some, a lot of, etc.