The more you get out and do it, the better you get at it.
When you are a good public speaker you create more personal brand awareness.
When people know your company and what you do and then hear and see you speak, you build your personal brand.
By speaking in public you build your own presence and awareness and people remember you, and often people will want to connect with you later.
Public speaking is an incredible exposure for you, your product and your company.
One of the best by-products of public speaking is the sheer amount of new (prospect) customers that you get the opportunity to connect with.
Good public speaking is one lane on the marketing and PR freeway, but it is a powerful venue to get your name, product and company out there and identify yourself as a leader.
Don't let anyone stop you, become a good public speaker it will open doors for you and your business.