Quantifiers are words that modify nouns. We use them to give more information about nouns; they tell us the amount or quantity of a noun.
To understand which quanifier to use, you need to know countable and uncountable nouns.
For example cars are countable so we can use many:
"How many cars are in that garage?"
Snow is uncountable so we can use much:
"We didn't get much snow here last winter."
Some quanifiers can be used with both countable and uncountable nouns, for example some:
"Some people I work with play golf."
"Do you have some time to check this report?"
Here's a quick quiz to revise quantifiers: