There are similar elements between an persuasive speech and an informative speech. When you are trying to persuade someone in a speech you need to make sure you are informing them about the topic and reasons as to why they should buy/try a produce or service. To persuade someone, they usually need the information and facts so that they understand why they should do something. The only way most people are able to be persuaded is by getting them to understand the importance of why they should do something.