An extemporaneous speech is a well-prepared speech that relies on research, organization, and practiced delivery, but is neither read nor memorized. It requires the speaker to think on their feet and speak conversationally from notes. While more spontaneous than memorized speeches, extemporaneous speeches require extensive preparation so the speaker is an expert on the content and can discuss it with depth. Effective extemporaneous speeches have meaningful content, sincere delivery, and an authentic speaking style to the individual.