Would you tell me what does the sentence mean?

Chess girl, you misspelled hello, and you need to add a space after each sentence. Also, you misspelled address, and your sentence about Gettysburg should read, I know it is from the Gettysburg Address. "Of the people, by the people, and for the people" is a phrase, not a sentence, and it means democracy, which is the form of government in which the people govern themselves.