It’s probably good to say at the beginning that it is a great benefit to be able do audience analysis research. It can help you better relate to your audience (pathos), shows you have the intelligence to speak to them in a way where they can identify what it is you are speaking about that interests them and meets real and felt needs that they likely have (logos), and your sensivity to getting their wave length may also convey you’re sincerity and good will (ethos).
Ceteris paribus we’d expect the greatest communication results when those things mesh.