What are the three reasons that journalists will include quotes?

According to The News Manual, the three main reasons journalists use quotes are:

1. - By repeating or typing the exact words the source spoke during the interview the writer avoids misrepresenting their intended message.

2. - When a journalist writes exactly the phrase or words spoken he or she allows the readers to see the connection between the ideas expressed and the way they were specifically expressed.

3. - By quoting verbatim a source, a writer allows its readers to appreciate the speaker's particular speaking style and translate some of that 'liveliness' into the written page