Speaking in front of a small group of people is OK, but when you consider speaking in front of a large group or in public, your heart rate increases.
Watch this Video to Know More about Tips for Speaking Effectively
Therefore, you must take the actions listed above in order to be a successful speaker. In other words, when performing on stage, you should only concentrate on doing well, focusing on improving from your last performance, attempting to affect a change in your audience, and paying less attention to your nerves and performance.