You should use taglines such as he says, he remarks, she yells to introduce a quote

a. every time you include any type of quote in your essay.
b. every time you are quoting someone else's words.
c. when using them fits better with your syntax than not using them.

What is a proverb? a paragraph or short essay in which a writer expresses his or her opinion on a topic using a main idea and key points a phrase or short sentence that expresses a rule everyone should follow or a rule that we should all try to live by a sentence or short paragraph that shares a story through which the reader can learn a valuable lesson about life a short saying, usually of unknown and ancient origin, that expresses effectively some commonplace truth or useful thought