people are afraid to speak in public
Most people are afraid to speak in public because they are afraid of being humiliated in front of large masses of people. They lack the confidence in themselves to handle the situation. However, we all have the ability to speak in public and do so with confidence and ease.
First you need to understand that speaking in public does not have to be stressful. Although many people have a fear of public speaking, this does not have to be so. Human beings around the world have overcome their fear and are now fluent and confident public speakers. Just knowing that you can overcome it is the first step.
You can go along to a public speaking course an learn how to feel confident when public speaking.