The document provides instruction on capitalization rules. It defines capitalization as writing the first letter of a word in uppercase and the rest in lowercase. It then lists the main rules of capitalization: 1) Capitalize the first word of a sentence. 2) Capitalize proper nouns like names of people, places, and things. 3) Capitalize the first word following a colon if it is a complete sentence. 4) Capitalize the first letter of the personal pronouns "I" and "O" within a sentence.