If there's one complaint I hear about a presenter's skills from their boss or a their HR, it's that they don't adjust their presentation for their audience. And yet those presenters genuinely believe that they do adjust for their audience.
So who is right? Well, they're both correct of course. The presenter thinks they are adjusting but they don't really KNOW their audience.
What about the audience themselves? What do they think? Sadly the audience don't have an opinion because they stopped paying attention and moved onto other, more exciting things like thinking about lunch or updating Facebook. To capture their attention and motivate them to act, you have to get top KNOW your audience