The document discusses the proper use of the words "much" and "many" in English grammar. It notes that "much" is used with uncountable nouns while "many" is used with countable nouns. However, many people struggle with this simple rule because of incorrect habits in their English usage. The document promotes an app that contains over 600 sentences to help users recognize the proper contexts for "much" and "many" through practice, so they can learn the right habit and no longer make mistakes with these terms.