Suppose you've written a report geared toward a target audience familiar with your topic, but you want your presentation to work for a general audience. What should you include in your speech?
If you practice your speech enough, you can read it out loud to your audience without any issues.
Practicing helps you identify and improve your public speaking skills before you deliver your speech.
Practicing helps you speak up about certain issues and helps you stay focused on your audience.
If you practice your speech enough, you will not get nervous in front of an audience.