Speakers want to be remembered.  

We’ve put a lot of effort in to creating, practicing, and then  delivering our speech. We want this effort to mean something because we  understand the importance of public speaking. We want to be remembered.  The challenge that we are facing is that we are talking to a diverse  audience. Everyone who is listening to us is different and they all  remember things differently. 

We need to understand how they remember and  then find ways to make them remember us.