What are vocal fillers commonly used in speech?

Vocal fillers, such as 'uh' or 'um', are commonly used in speech as pauses that disrupt the flow of communication. These sounds often occur when a speaker is thinking or trying to gather their thoughts, indicating a hesitation or uncertainty. While they can serve a purpose by giving the speaker a moment to collect their ideas, they do not enhance the clarity or structure of the speech and can distract the audience from the main message. Understanding the role of vocal fillers is crucial, especially in public speaking contexts, where clarity and smooth delivery are key to effective communication. This is why the option identifying them as words that disrupt flow accurately represents their nature in speech.