A final, and critical, function of the introduction is to motivate the audience to care about your topic and believe that it is relevant to them. One way to do this is to address its practical implications and what the audience stands to gain by listening to you. Another is to convince audience members that your speech purpose is consistent with their motives and values. A student speech about the value of interview training shows how this can be accomplished:

Let me start by telling you why you need interview training. It all boils down to competition. As in sports, when you’re not training, someone else is out there training to beat you. All things being equal, the person who has the best interviewing skills has got the edge.