The length of your pauses depends on the effect you want to create and the context of your presentation. Generally, you should pause for at least one or two seconds to make an impact; however, if you pause for too short, your audience might not notice or appreciate your pause, and if you pause for too long, your audience might get bored or confused. To determine how long to pause, consider pausing longer for more important or dramatic points (e.g. a key message, shocking statistic, or powerful quote) for three to five seconds to let it sink in and create an impression. For less important or obvious points (e.g. a transition, change of tone, or minor detail), pause for one or two seconds to indicate a shift and maintain the flow. Additionally, adjust the length of your pauses according to the situation and audience; if you are presenting in a noisy or distracting environment, you might need to pause longer to capture and retain their attention, but if you are presenting to a large or diverse audience, you might need to pause shorter to avoid losing their interest or engagement.