Count and
Non-count nouns

also known as

Countable nouns and Uncountable
nouns 

You can count how many you have.     
You can't count how much you have.

Some nouns are countable. You can add an s to plural countable
nouns: cars, pencils, boys.

You can add a or an to a singular countable noun: a
car, an egg, a boy. You can use the word many with countable
nouns: many cars.

Some nouns are uncountable (noncount). Uncountable nouns don't
have plurals. You can't add an s to uncountable nouns: information,
transportation, milk. You can't add a or an to uncountable nouns.

You can use much, a lot of, a little with uncountable
nouns: much traffic, a lot of information, a little milk.

With count nouns, you can use certain determiners such as a few
or several. You can also use some. You can also use some
with uncountable nouns, but you cannot use a few or several
with uncountable nouns.

Yes: There were several new chairs in the room.

Yes: There were a few new chairs in the room.

Yes: There were some new chairs in the room.

Yes: There was some new information in the report.

No: There were some new information in the report.

No: There were several new information in the report

No: There was some new informations in the report.