The pause can be used in a speech to capture the audience attention...
"Using a micro-pause interrupts the daydreaming of audience members and brings them back to active listening. In addition, you can use a pause to transition to a new topic. Your audience members, as they listen to you, are evaluating your words in the framework of your existing context." -- https://www.toastmasters.org/magazine/magazine-issues/2019/july/silence-is-golden