Here's why:
* Grammar is about the rules of language. This includes the correct use of punctuation, spelling, and capitalization.
* Capitalization rules are essential for clarity and readability. They help distinguish proper nouns (names of people, places, things, etc.) from common nouns, and they signal the start of sentences and titles.
Examples:
* Incorrect: the united states of america
* Correct: The United States of America
* Incorrect: i went to school today.
* Correct: I went to school today.
While capitalization errors might not always be as significant as other grammatical errors, they can still affect the overall impression of your writing and make it appear unprofessional or careless.