In my opinion, there are so many advertisements everywhere we go, but many/much of them are ineffective.

Question

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Which one do we have to use, many or much?

Answer 1

Many. Much suggests quantity, like, "How much milk is left in the bottle?" "Many" also may mean quantity, or numbers, but implies a large or a specific amount, as in, "How many crayons are in that box."

http://www.merriam-webster.com/dictionary/many

http://www.merriam-webster.com/dictionary/much