The words (Much and Many) means => a lot of.
If a noun is in singular, we use much
Example – much money
If a noun is in plural, we use many
Example – Many friends
=>Use of Much and Many
In everyday English, we normally use much / many only in questions and negative clauses.
Like – How much money have you got?
Carla does not have many friends.
=>In positive clauses with so, as or too , we also use much / many.
Example – Carla has so many friends.
She has as many friends as Sue.
Kevin has too much money.
=>In all other positive clauses, however, we prefer expressions like a lot of / lots of.
Example – Carla has a lot of / lots of friends.
Kevin has a lot of / lots of money.
In formal texts, however, much / many are also common in positive clauses. This you will notice for example when you read English news.
=>Countable / Uncountable Nouns
In connection with much / many people often speak of countable nouns and uncountable nouns .
Countable nouns have a singular and a plural form. In plural, these nouns can be used with a number (that’s why they are called ‘countable nouns’). Countable nouns take many.
100 friends – many friends
Uncountable nouns can only be used in singular. These nouns cannot be used with a number (that’s why they are called ‘uncountable nouns’). Uncountable nouns take much.
100 money – much money
Note: Of course you can count money – but then you would name the currency and say that you have got 5 euro (but not „5 money“).