There are many different things that make a speech effective. For one you must make your reader understand the purpose whether you are informing, persuading, or entertaining. Also, a speech ,just have full emotion to it, you want to make your audience understand where your coming from. You can make your audience feel happy, sad, mad or whatever type of way you want if you use the right vocabulary and emotion. I'm sure there are more things that could make a speech very effective but these are the main ones that I think make a great speech .