I frequently advise PTOs to brag more about their group and to make communication and public relations a priority. PTOs and PTAs benefit greatly when parents and school staff are reminded of their good work, and when the PTO voice comes across as positive and welcoming.
If you want to make a difference, you need help and support. And you get a lot more of both when your school community has a warm feeling about your group. If you don't set that tone, no one else will.
How you communicate, what you say, your tone—these are all part of the strategy. I'd recommend asking one of your best volunteers to make this her priority.
Here are tools for your group that can help you communicate the right way: