When you are travelling to a new place - do you need a map? Yes!
Do you need signposts? Yes!
Do you sometimes need to stop and check where you are going? Yes!
Just as you need signposts on a road, you need to signpost your talk to guide the audience through your presentation, link one point to the next, and help you to give them a clear message.
It's not just the signposts that are important ... You need to PAUSE
to bring attention to key points
to give yourself time to think
to stop yourself from speaking too fast!